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The variable r in geometry equations referrs to the radius. The radius is the distance between the center of the circle and its edge, such that 2 x r = d where d = diameter (width). You can define the size or volume of a circle or sphere simply by knowing its radius.
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What is the radius if the circumference is 3 inches?
the formula for the circumference isc=2(pi)rSince you already have the circumference, just plug it into the formula, and solve:3=2(pi)r divide by 2pi0.47746483 = r
Why is it pie r squared is the exactly formula for circumference?
It isn't. That is the formula for the AREA of a circle!
What is the formula for circumference to area of a circle?
2 pi r and pi r 2
What is the formula used to find the circumference when you know the radius?
A=pi times r times r
What do you do when you have a formula of 2 pi r?
That's the formula for the circumference of a circle, when you know the radius. What you do is multiply all three together. Pi is approximately 3.14, and r stands for the radius. The result of the multiplication is the circumference.
What is 2pi r?
it is the formula of circumference of circle
Is the circumference 3 times the radius?
No, the formula for a circumference of a circle is 2(pie)r For example, if r is 6, the the circumference is 12(pie)
What is the circumference of a circle of the radius of .25?
The circumference is the distance around a circle. The formula for circumference is 2*pi*r. If we say pi = 3.14 and r = .25, we plug these numbers into our formula, and get an answer of about 1.57.
What is the radius if the circumference is 3 inches?
the formula for the circumference isc=2(pi)rSince you already have the circumference, just plug it into the formula, and solve:3=2(pi)r divide by 2pi0.47746483 = r
What is the formula for the circumference of a circle with the radius of 4?
circumference=2 times (pi) times r: where r is the radiusC=2pir
What is the formula for finding the circumference of a semicircle?
2 pi r = circumference. 1/2 of that is pi x r. pi is 3.142
Formula for radius if circumference known?
r = C/2π
Why is it pie r squared is the exactly formula for circumference?
It isn't. That is the formula for the AREA of a circle!
What is a formula for calculating the radius of a circle when the circumference is known?
The way to find the circumference is either 2 x pi x r, or pi x d.So rearrange the formula:circumference = 2 x pi x rcircumference / 2 x pi = rSo take the circumference, and divide it by 2 pi and you have the radius.A:Using the formula for circumference which is 2(pi)r solve for r. Now you have radius = circumference/(2pi). The formula for area of a circle is (pi)r^2. Substituting r with circumference/(2pi) you get area = pi(circumference/(2pi))^2. When you simplify you get area = circumference^2/(4pi).
What is the formula for circumference to area of a circle?
2 pi r and pi r 2
If the circumference of a circle is 28π units, what is the radius of the circle?
Formula of Circumference = 2πr 2πr = 28π 2r = 28 r = 14 The radius is 14
What is the formula for the circumference of a cylinder?
2 x pi x r
