0
You're supposed to know that
Circumference = (pi) x (diameter)
Divide each side of this equation by (pi) :
Diameter = Circumference/pi
And you also know that Diameter = 2 x Radius .
2 x Radius = Circumference/pi
Divide each side of that one by 2 :
Radius = Circumference/2 x pi .
and that's exactly what you need.
Remember the circle equations.
C = pi d
or
C = 2 pi r
NB d = 2r
By algebraic rearrangement
r = C / (2 pi)
Add your answer:
Earn +20 pts
What is the formula for finding the diameter of a circle when the circumference is given?
C = pi d By algebraic rearrangement d = C / pi
How do you find the radius when you have the circuference?
circumference = pi * 2radius (diameter) so to find radius you use circumference/(2 x pi) this will find radius ----
Given the circumference of a circle what is the radius?
Circumference equals the diameter times pi. The diameter is 2 times radius. Radius equals Circumference divided by pi then divided by 2.
How do you get circumference when you are given radius?
Circumference is equal to pi x diameter Diameter is equal to 2 times the radius Circumference would be 2 x pi x radius
What is the formula for the diameter or a circle?
If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi
How do you find the radius if circumference is given?
Divide the circumference by 2PI to find the radius. ( C = 2PI*Radius)
How can you find the diameter and the radius if the circumference is given?
Diameter = circumference/pi Radius = circumference/2*pi
How do you find length and width given the circumference?
If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)
When given radius how do you find the circumference?
Circumference = 2 * radius * pi (where pi is approx = 3.14159)So Radius = Circumference / (2 * pi)
What is the formula to find circumference when you are given the radius?
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
How do you find the radius of a circle when only given the circumference?
Divide the circumference by (2*pi)
When given the circumference how do you find the diameter and radius?
divide 3.14 by circumference and d=2r
How can I find circumference when only area is given?
Radius = square root of (area/pi) Circumference = 2*pi*radius
How do you find radius of a circle if circumference is given?
circumference = 2 x π x radius ⇒ radius = circumference ÷ (2 x π) Divide the circumference by two times π (≈ 6.283).
How do you find the area of a circle without knowing the radius?
If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.
How do you find the radius of a circle when the circumference is given?
Divide the circumference by the value of Pi, then halve that result.
How do you find circumference of a circle given?
circumference of a circle = 2*pi*radius or pi*diameter
