2007-03-28 14:40:17 · 12 answers · asked by Taylor L 1 in Science & Mathematics ➔ Mathematics
Circumference = 2 pi r
so divide circumference by 2pi and you get the radius!
2007-03-28 14:44:20 · answer #1 · answered by Bazz 4 · 0⤊ 0⤋
since pi is the ratio of the circumference to the diameter, if you know the circumference, you can figure the diameter, which is twice the radius.
Let's say a circle is 31.4 meters in circumference. Divide that by pi (3.14) and you get the diameter (10.) 1/2 of that is the radius (5.)
2007-03-28 21:45:23 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Divide the circumference by 2*pi to get the radius
2007-03-28 21:45:05 · answer #3 · answered by Mr Engineer 2 · 0⤊ 0⤋
Circumference is C=2 x pi x radius
set the equation equal to your circumference, then divide away the 2 and the pi. you will be left with your radius!
good luck
2007-03-28 21:45:24 · answer #4 · answered by Math Teacher 3 · 0⤊ 0⤋
Circumference = 2*pi*radius
radius =( Circumference) / (2*pi)
2007-03-28 21:59:47 · answer #5 · answered by Anonymous · 0⤊ 0⤋
circumference is 3.14 times diameter.
If the circumference, for example, is 30, then
30 = 3.14X
X = 9.554 This is the diameter
Radius is half the diameter, or 4.777
2007-03-28 21:58:07 · answer #6 · answered by ? 6 · 0⤊ 0⤋
Take the circumference and divide by (2 times pi)
Pi = 3.1415927...
2007-03-28 21:48:00 · answer #7 · answered by Ohioguy95 6 · 0⤊ 0⤋
circumference =2 pi r
so circumference/(2pi)=radius
2007-03-28 21:46:00 · answer #8 · answered by dla68 4 · 0⤊ 0⤋
Just divide the circumference by 2pi or 6.28 and you,ve got it.
2007-03-28 21:45:02 · answer #9 · answered by ironduke8159 7 · 0⤊ 0⤋
Cir = 2 pi r, so
radius = circum/2pi
2007-03-28 21:45:10 · answer #10 · answered by Anonymous · 0⤊ 0⤋