In linear equation, 15 marks points did Ned receive or lose overall .
What in mathematics is a linear equation?
A linear equation is an algebraic equation of the form y=mx+b, where m is the slope and b is the y-intercept, and only a constant and a first-order (linear) term are included. The variables in the preceding equation are y and x, and it is occasionally referred to as a "linear equation of two variables."A linear equation with one variable is one that contains just one variable. It has the formula Ax + B = 0, with A and B being any two real numbers and x being an ambiguous variable with only one possible value. One such linear equation in one variable is 9x + 78 = 18.5 questions wrong that were each worth 5 points (-5x5=-25)
So he lost 25 points but he got 10 extra from the bonus question, so -25 + 10= -15.
He lost 15 marks overall
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Simplify the expression
3\sqrt{27x^6y^4}
The simplified form of given expression 3√{27x^6y^4} is x³y²9√3
In this question, we have been given an expression 3\sqrt{27x^6y^4}
We need to simplify given expression.
3√{27x^6y^4}
= 3√{(3 × 9) x^6 y^4}
= 3√(3 × 9) × √x^6 × √y^4
= 3 (3√3) × x^(6/2) × y^(4/2)
= 9√3 × x³ × y²
= x³y²9√3
Therefore, the simplified form of given expression 3√{27x^6y^4} is x³y²9√3
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Determine whether the statement is always, sometimes, or never true. Explain you reasoning.
If point A lies in plane P , then AB↔ lies in plane P.
A line segment is also a line but a line with finite length and fixed endpoints. The given statement "If point A lies in plane P, then AB↔ lies in plane P" can be sometimes true.
What is a line?A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely.
A line segment is also a line but a line with finite length and fixed endpoints.
The given statement "If point A lies in plane P, then AB↔ lies in plane P" can be sometimes true. Because if Point A and B both lie on the same plane, p then line AB will lie on plane P. Therefore, the given statement "If point A lies in plane P, then AB↔ lies in plane P." will be true.
But if Point A lies on plane P, while point B lies on another plane, then line AB will not lie on plane P. Therefore, the given statement "If point A lies in plane P, then AB↔ lies in plane P." will be false.
Hence, The given statement "If point A lies in plane P, then AB↔ lies in plane P" can be sometimes true.
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Find the slope of the line through each pair of points. (-2,-4) and (1,2)
The slope of the line passing through the pair of points, (-2 , -4) and (1 , 2), is 2.
The slope, m, determines the steepness of a line. It can be measured by the vertical distance from one point to another divided by the horizontal distance of the same points. The formula for solving the slope is:
m = (y2 - y1)/(x2 - x1)
where m is the slope
x1 and y1 are the coordinates of one point
x2 and y2 are the coordinates of the 2nd point
Given two points in the line, (-2 , -4) and (1 , 2), plug in the values to the formula for the slope.
m = (y2 - y1)/(x2 - x1)
m = (2 - -4)/(1 - -2)
m = 6/3
m = 2
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The sides of a triangle have lengths 2 x, 8 , and 12. If the length of the longest side is 2 x , what values of x make the triangle acute?
The values of x to make the triangle acute is [tex]2 < x < 2\sqrt{13}[/tex].
Triangle inequality theorem states that that the sum of any two sides of the triangle is greater than the third side of of the triangle
Pythagorean Inequality theorem states that if the square of the longest side is less than the sum of squares of other two sides then the triangle is acute.
In the given question
Longest side = 2x
other two shorter side = 8 and 12.
By Triangle Inequality theorem
(i) 8+12>2x ⇒20>2x ⇒x<10
(ii) 2x+8>12 ⇒2x>4 ⇒x>2
(iii) 2x+12>8 ⇒2x>-4 ⇒x>-2
From (I), (ii) & (iii) we conclude that value of x should be in between 2<x<10.
To make the triangle acute
Using Pythagorean Inequality theorem
[tex](2x)^{2} < 8^{2} +12^{2} \\ \\ 4x^{2} < 64+144\\ \\ 4x^{2} < 208\\ \\ x^{2} < \frac{208}{4}[/tex]
[tex]x^{2} < 52\\ \\ taking. Square. Root . both . the . sides \\ \\ x < \sqrt{52} \\ \\ x < 2\sqrt{13}[/tex]
Therefore , the value of x to make the triangle acute is [tex]2 < x < 2\sqrt{13}[/tex].
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A school system is reducing the amount of dumpster loads of trash removed each week. in week 5, there were 45 dumpster loads of waste removed. in week 10, there were 30 dumpster loads removed. assume that the reduction in the amount of waste each week is linear. write an equation in function form to show the amount of trash removed each week. f(x) = −3x 45 f(x) = 3x 45 f(x) = −3x 60 f(x) = 3x 60
f(x) = −3x + 60 is the linear equation in function form to show the amount of trash removed each week.
Let x be the number of weeks and y be the trash removed
Then , the linear equation can be given as
y=mx+c
To find out the slope and intercept, let's have a look at the given conditions.
For week 5, we can write the equation as
45 = 5m +c ... (1)
For week 10, we can write the equation as
30 =10m +c ......(2)
Solving both the equation by elimination method
(45 = 5m +c) * 2
30 = 10m+c
c = 60
Now, finding the value of x by substituting value of c in eq (1)
45 = 5m + 60
-15 = 5m
m = -3
Now, the required linear equation becomes
y = -3x + 60
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A flea landed on a coordinate grid. The flea hopped across the x -axis and then across the y -axis in the form of two consecutive reflections. Then it walked 9 units to the right and 4 units down. If the flea's final position was at (4,-1) , what point did it originally land on?
The original coordinates of flea were ( 5 , - 3) .
What does coordinate mean in this case?
To coordinate is to make plans for things to come together or to collaborate with another person to achieve a goal. Coordination occurs when all the details of a journey are planned. When you and a friend divide up a large science project and decide who will do what, that is an example of coordination.F' = ( 4 , - 1 )
To undo translation of 9 units’ right and 4 units down, translate 9 units left and 4 units up
( 4, - 1 ) → ( 4 - 9 , -1 + 4 )
→ ( -5,3)
Reflect back across Y-axis to undo reflection means change x -coordinate by -1
(- 5,3) → ( 5, 3)
Reflect back across x-axis to undo reflection means change y-coordinate by -1
( 5 , 3) → ( 5 , - 3)
Therefore the original coordinates of flea were ( 5 , - 3)
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Could I get an equation for this problem please?
*See picture for word problem
The number of tacos that you can get if a drink cost $1.50 and each taco cost $.75 is 4.67.
Word problemCost of a drink = $1.50Cost of each taco = $.75Total amount with you = $5Number of tacos bought = t5 = 1.50 + 0.75t
subtract 1.50 from both sides5 - 1.50 = 0.75t
3.50 = 0.75t
divide both sides by 0.75t = 3.50 / 0.75
t = 4.666666666666666
Approximately,
t = 4.67
Therefore, the number of tacos that you can get if a drink cost $1.50 and each taco cost $.75 is 4.67
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HELP ASAP!!!!!!!
Which expression is equivalent to −5 + 8 − 6x − 8x?
1.) 14x + 13
2.)-14x - 3
3.)-14x + 3
4.)-14x + 13
The expression 3-14x is equivalent to -5+8-6x-8x.
The phrase has the same meaning as,
=-5+8-6x-8x
=(3)-(14x)
=3-14x
Any combination of terms that have undergone operations like addition, subtraction, multiplication, division, etc. is known variable expression. Let's use the equation 5x + 7 as an example. Thus, 5x + 7 is an illustration of an algebraic expression.
There are three primary categories of algebraic expressions, including: Numeral Expression. Binary Expression of a polynomial.
Properties:
Equivalence Property.Associative Quality.Discretionary PropertyProperty of identity.Contrary Property.Hence, the expression 3-14x is equivalent to -5+8-6x-8x.
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Answer: -14x + 13
Step-by-step explanation:
...Sorry................
The Average consumption per person in the country in the given year is 7.6 gallons
How to find average consumption?
Average is found by adding the several amounts together and then dividing by the total number of amounts added.
Given that the annual consumption of fruit juice of a particular country = the total consumption by whole population in that year= [tex]2.28*10^{9}[/tex] gallons
Total population of that country in the given year = [tex]3.0*10^{8}[/tex]
Therefore Average consumption per person
=total consumption / total population
[tex]\frac{2.28*10^{9} }{3.0*10^{8} } \\=0.76*10\\=7.6[/tex]
This means the Average number of gallons consumed per person in the country in the given year is 7.6 gallons
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COORDINATE GEOMETRY Find the distance from P to l. Line l contains points (-3,0) and (3,0) . Point P has coordinates (4,3) .
According to the given statement the perpendicular distance form the point (4,3) is 3.
What Exactly Is Coordinate Geometry?Coordinate Geometry can be used to define points in space. The primary axis labeled a x- and y-axes is defined first, and then the points were measured and labelled in relation to these points. Furthermore, numerous geometric forms such as a line, curve, circle, ellipse, and hyperbola can be plotted inside the coordinate axes and their attributes studied.
According to the given data:the equation for line ℓ.
Begin by finding the slope of the line through the given points, (-3,0) and (3,0):
m = (Y₂ - Y₁)/(x₂ - x₁)
= (0 - 0)/(-3 - (-3))
= 0/0
The equation of the line using point (3,0) on the line:
Y - Y₁ = m(x - x₁)
putting value we get: (m = 0)
Y =0(x + x₁)
Y = 0
The equation of the line w perpendicular to line ℓ through P(4,3).
The slop of line l is 0.
hence this will be x- axis
and perpendicular distance from a point (x1,y1) to x- axis will be y1.
So the perpendicular distance form the point (4,3) is 3.
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Simplify by combining like terms. 5 f-(5 d-f)
The simplification by combining like terms of 5f - (5d - f) is 6f -5d.
According to the given question.
We have an expression 5f - (5d - f).
As we know that, like terms are terms whose variables (and their exponents such as the 2 in x2) are the same. When we combine like terms, such as 2x and 3x, we add or subtract their coefficients.
Since, we have to combine the like terms of the given expression
5f -(5d -f).
Here 5f and -f are the like term.
So, we subtract coeffcients of f to simplify the given expression.
Therefore, the simplification of 5f - (5d -f) is given by
5f - (5d - f)
= 5f - 5d + f
= 6f - 5d
Hence, the simplification by combining like terms of 5f - (5d - f) is 6f -5d.
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Explain the similarities and differences between the material derivative and the reynolds transport theorem.
In Fluid Mechanics, we describe the motion of fluids using two different frames of reference- the Eulerian( fixed frame of reference wrt fluid particles; describes the rate of change of fluid flow property at a fixed position in space) and the Lagrangian (follows individual fluid particles and describes the rate of change of fluid flow properties of the particle as it passes through space).
A Material derivative is basically a Lagrangian way of expressing the rate of change of fluid flow property. It expresses the rate of change of fluid property wrt time and also the rate of change wrt space because of its movement at some velocity. It is best explained by John D Anderson jr. in his book "Computational Fluid Dynamics". He explains that the material derivative can be best understood by considering an example of imagining oneself entering a cold cave. The material derivative is the change in temperature you would feel as if you would just enter into the cave from the outside and precisely at the same time if someone throws snowballs at you. The rate of change of temperature because of your movement into the cave is the rate of change wrt space and that due to the snowball effect would be the rate of change w.r.t time.
Coming to the Reynolds Transport theorem is a powerful tool in fluid mechanics that relates the change in properties of a system to change in properties in a control volume. Since laws of thermodynamics are applicable to a system, the Reynolds transport theorem allows it to be applied to a control volume (fixed or moving, or deformable).
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x < -3
Solutions:
X=
X=
X=
On a Number Line
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
The values of the x in number line are -7 -6 -5 -4.
According to the statement
We have to find that the numbers in the number line.
So, For this purpose, we know that the
A number line is a horizontal line that has equally spread number increments
From the given information:
The given equation is a x < -3 And a numbers givens On a Number Line are:
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
It means we have to find the numbers in a number line less than the -3.
we know that the large numbers with the negative sign are a smaller number and
the Small numbers with the negative sign are a larger number.
According to this,
The numbers -7 -6 -5 -4 are the values of the x less than the -3.
So, The values of the x in number line are -7 -6 -5 -4.
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14. MP Be Precise A standard shower drain
can drain water at the rate of 480 gallons
2
in ²3/3
hour. Create three different rates, using
the same or different units, that are all
equivalent to this rate. Be precise in the
units you choose. Then find the unit rate, in
gallons per minute.
Graw-Hill Education
A typical shower drain can remove 480 gallons of water in 3 hours.
For the first-rate;
1,440 gallons in 3 hours
We calculate the unit rate.
By Dividing the total volume by the total time,
1440 / 3 = 480 gallons/ hours
For the second rate:
960 gallons in 120 minutes
Converting minutes to hours:
120 minutes = 2 hours
We calculate the unit rate.
By dividing the total volume by the total time,
960 / 2 = 480 gallons / hour
For the third rate:
720 gallons in 1.5 hours
We calculate the unit rate.
By dividing the total volume by the total time,
720 / 1.5 = 480 gallons / hour
Now,
480 gallons/ hour = 480 / 60 gallons/ minute = 80 gallons per minute
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Find reference angle and exact value
The reference angle of the angle of -240º is of 60º.
The sine of the angle is given by:
[tex]\sin{-240^\circ} = \frac{\sqrt{3}}{2}[/tex]
How to find the reference angle of -240º?The first step towards finding the equivalent angle of a negative angle is finding it's positive equivalent, adding 360º to it, hence:
-240º + 360º = 120º.
Then we have to find the equivalent on the first quadrant. 120º is on the second quadrant, hence:
180º - 120º = 60º.
The reference angle of the angle of -240º is of 60º.
On the second quadrant, the sine is positive, hence:
[tex]\sin{-240^\circ} = \sin{60^\circ} = \frac{\sqrt{3}}{2}[/tex]
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write 3 names for the angle
The names of the three angles are:
∠ABC = acute angle
∠FGH = right angle
∠QRS = obtuse angle
We have,
From the figure given,
The angles must be either right angles, acute angles, or obtuse angle.
Acute Angle: An acute angle is an angle that measures less than 90 degrees. It is smaller than a right angle.
Obtuse Angle: An obtuse angle is an angle that measures greater than 90 degrees but less than 180 degrees. It is larger than a right angle.
Right Angle: A right angle is an angle that measures exactly 90 degrees. It forms a perfect "L" shape and is typically denoted by a square corner symbol (∟).
Now,
The angle is less than 90 degrees.
∠ABC = acute angle
The angle is 90 degrees.
∠FGH = right angle
The angle is greater than 90 degrees.
∠QRS = obtuse angle
Thus,
The names of the three angles are:
∠ABC = acute angle
∠FGH = right angle
∠QRS = obtuse angle
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What are the vertex and range of y = |x + 3| + 2?
(−3, 2); 2 ≤ y < ∞
(−3, 2); −∞ < y < ∞
(0, 5); 2 ≤ y < ∞
(0, 5); −∞ < y < ∞
Answer:
(−3, 2); −∞ < y < ∞
Step-by-step explanation:
Write a function g whose graph represents a translation 5 units up of the graph of f (x) =3x
The required graph of the function whose translation 5 units up of the graph of f (x) =3x is g(x) = 3x + 5.
To determine a function g whose graph represents a translation 5 units up of the graph of f (x) =3x.
Here,
Given function f(x) = 3x
Now, for the upward translation by 5 units,
The function can be changed as the output of F(x) by +5 units so,
g(x) = 3x + 5
Thus, the required graph of the function whose translation 5 units up of the graph of f (x) =3x is g(x) = 3x + 5.
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Each of these sequence or series formulas involves four quantities that are represented by a variable. For each fomula, describe the four quantities.
a. a n=a₁ +(n-1)d
The formula for estimating the nth term of an arithmetic sequence exists:
a n = a₁ + (n-1)d
What is meant by arithmetic sequence?A series of numbers named an arithmetic progression or arithmetic sequence (AP) contains a constant difference between the terms.
The formula for estimating the nth term of an arithmetic sequence exists:
a n = a₁ + (n-1)d
The four quantities in the formula exist a n, a₁, n, d
The description exists as follows:
an be the nth term of the sequence
a₁ be the first term of the sequence
n be the number of terms
d be the common difference
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Two spheres have surface areas of 100 \pi square centimeters and 16π square centimeters. What is the ratio of the volume of the large sphere to the volume of the small sphere?
The ratio of the volume of the large sphere to the volume of the small sphere is 125/8.
Given two spheres having surface areas of 100π square centimeters and 16π square centimeters, solve for the radius of each spheres using the formula for the surface area of sphere.
A = 4πr^2
Sphere 1 : 100π cm^2 = 4πr^2
r^2 = 25
r = 5 cm
Sphere 2 : 16π cm^2 = 4πr^2
r^2 = 4
r = 2 cm
Then, solve for the volume of each spheres using the formula:
V = 4/3πr^3
Sphere 1 : V = 4/3π(5cm)^3
V = 500/3 π cm^3
Sphere 2 : V = 4/3π(2cm)^3
V = 32/3 π cm^3
Getting the ratio of the volume of the large sphere to the volume of the small sphere,
ratio = 500/3 π cm^3 / 32/3 π cm^3
ratio = 125/8
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Which expression is equivalent to 3(4.26y − 5.07)?
Answer:
12.78y -15.21
Paige solved the inequality -1/2x > -6 by using the Division Property of Inequality to get x >12 Did Paige solve the inequality correctly?
Using the Division Property of Inequality, Paige was able to get x > 12 and solve the inequality -1/2x > -6. Paige solve the inequality correctly.
Given that,
Using the Division Property of Inequality, Paige was able to get x > 12 and solve the inequality -1/2x > -6.
According to the division property of inequality, if we divide an equation's two sides by the same number, the equation doesn't change.
Let's say you have two identically sized pizzas. You divide each one into halves and serve your buddies one half of each pizza. You will have equal pieces of both pizzas left over if you measure the remaining portions.
-1/2x>-6
-1x>-6[tex]\times[/tex]2
-1x>-12
multiplying -1 on both sides we get
x>12
Therefore, Paige solve the inequality correctly.
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Can Pi be written as a fraction?
Please help its my last question on the test and its due today!
i will give "Thanks" and "Brainlist"
Answer:
Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction.
Answer:
No
Step-by-step explanation:
It can not be a fraction because it is a never-ending/infinite decimal.
direct proportion please help
Answer:
qjjsHope this helps you.
Plllleaseee helppppp
The line of best fit for the given points is:
y = 0.3913x + 39.26
The graph at the end of the answer shows both the scatter plot and the line.
Applying it's concept, taking points (60, 64) and (70,67), the slope of the line is of 0.3.
How to find the equation of linear regression using a calculator?To find the equation, we need to insert the entire set of points (x,y) given by the scatter plot in the calculator.
From the table, the points are given as follows:
(60, 65), (53, 59), (44, 57), (61, 61), (70,67).
Inserting these points into the calculator, the line of best fit is given by:
y = 0.3913x + 39.26
The graph at the end of the answer gives both the line and the scatter plot(points without the line).
How to estimate the slope?
Given two points, the slope is given by change in y divided by change in x.
Taking points (60, 64) and (70,67), the slope is given by:
m = (67 - 64)/(70 - 60) = 3/10 = 0.3.
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what is the answer to
-2(2x+3)= -4(x+1)-2
Step-by-step explanation:
-4x-6=-4x-4-2
-4x+4x=6-4-2
x=1
The rectangle shown has an area of 84 square inches. Find the dimensions of the rectangle.
The dimensions of the rectangle:
Length = 12 inches
Width = 7 inches
What is the Area of a Rectangle?Area of a rectangle = (length)(width)
Given the following:
Area of the rectangle = 84 square inches
Length = x + 3
Width = x - 2
Therefore:
(x + 3)(x - 2) = 84
Expand
x² + x - 6 = 84
x² + x - 6 - 84 = 0
x² + x - 90 = 0
Factorize
(x - 9)(x + 10) = 0
x = 9 or x = -10
Substitute x = 9 into each expression to find the dimensions of the rectangle:
Length = x + 3 = 9 + 3 = 12 inches
Width = x - 2 = 9 - 2 = 7 inches
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Find f(-3), f(0) , and f(1) for the function f(x) = (2/5)x-2
The f(-3), f(0) , and f(1) is (-16/5), -2 and (-8/5).
The given function is f(x) = (2/5)x-2
1) f(-3) = x = -3
Substituting the value of x in the equation f(x) = (2/5)x - 2, we get -
f(-3) = (2/5)x - 2
f(-3) = (2/5)(-3) - 2
f(-3) = (-6/5) - 2
f(-3) = (-6 -10)/5
f(-3) = -16/5
2) f(0) = x = 0
Substituting the value of x in the equation f(x) = (2/5)x - 2, we get -
f(0) = (2/5)(0) - 2
f(0) = -2
3) f(1) = x = 1
Substituting the value fo x in the equation f(x) = (2/5)x - 2, we get -
f(1) = (2/5)(1) - 2
f(1) = (2/5) - 2
f(1) = (2 - 10)/5
f(1) = -8/5
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Suppose a is a 57 matrix. How many pivot columns must a have if its columns span ? why?.
The answer is Option B.
In the given choices there is some mistake so, the correct choice can be defined in the attached file. please find it.
In the given question, If the column of a matrix and the A span is equal, and then the value of A has a pivot in each row, that's why in each pivot its position in the different columns of A has the five pivot columns, that's why the choice B is correct.
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Although part of the question is missing the question is Suppose A is a 5x7 matrix. How many pivot columns must A have if its columns span R^5? Why?
a. The matrix must have nothing pivot columns. If A had fewer pivot columns, then equation A would have only the trivial solution.
b. The matrix must have nothing pivot columns. The statements "A has a pivot position in every row" and "the columns of A span " are logically equivalent.
c. The matrix must have nothing pivot columns. Otherwise, equation A would have a free variable, in which case the columns of A would not span.
d. The columns of a 57 matrix cannot span because having more columns than rows makes the columns of the matrix dependent
Construct an equilateral triangle. Verify your construction using measurement and justify it using mathematics. (Hint: Use the construction for copying a segment.)
A triangle PRS is an equilateral triangle.
An equilateral triangle is a triangle whose all the three sides are equal and each angle measures 60º.
To construct an equilateral triangle:
1) First draw a ray PQ.
2) Then, with P as center and radius equal to 5 cm, draw an arc to cut ray PQ at R.
⇒ PR = 5 cm
3) Then, with R as the center and radius equal to 5 cm, draw an arc to intersect the initial arc at S.
4) Join PS and RS.
Now, the triangle PRS is an equilateral triangle with each side length of 5 cm.
Now mathematically we prove that the triangle we've constructed is an equilateral triangle.
PR = PS .......................(the radius of the arc is same)
PR = RS .......................(the radius of the arc is same)
Hence by transitivity property,
PR = RS = PS which is 5 cm
Therefore, triangle PRS is an equilateral triangle.
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