2007-09-22 09:04:10 · 14 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
C = 2 π r
r = C / ( 2 π )
2007-09-22 20:36:58 · answer #1 · answered by Como 7 · 0⤊ 0⤋
Circumference = 2 x pi x radius so divide the circumference by 2pi to get the radius.
2007-09-22 16:10:52 · answer #2 · answered by Anonymous · 1⤊ 0⤋
circumference = 2 x pi x radius
Therefore, you divide your circumference by 2 x pi to equal out both sides of the equation, which will give you the radius.
2007-09-22 16:13:27 · answer #3 · answered by wooman 2 · 1⤊ 0⤋
Divide the circumference by pi (3.14159) this gives you the diameter then divide by 2 for the radius.
2007-09-22 16:12:50 · answer #4 · answered by jonny.builder 2 · 0⤊ 0⤋
Circumference is 2piR. So if you take the circumference and divide it by 2pi you will get the radius. OK .
2007-09-22 16:12:57 · answer #5 · answered by Anonymous · 0⤊ 0⤋
2 x pi x r = Circumference
r therefore is circumference divided by 2 x pi
2007-09-22 16:19:00 · answer #6 · answered by porkchop 4 · 0⤊ 0⤋
Divide by 2*pi
2007-09-22 16:10:02 · answer #7 · answered by tentofield 7 · 0⤊ 0⤋
divide the circimference by 2 times pi
2007-09-22 16:51:35 · answer #8 · answered by rosie recipe 7 · 0⤊ 0⤋
If the circumference was 18.84cm then on a calculator do :
18.84 divide 6.28318
6.28318 is pi multiplied by 2
Answer should be about 3.
In spreadsheets 18.84/(pi*2)
2007-09-22 16:24:50 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Hi,
C=2 multiplied by pi multiplied by R
Therefore using transposition in algebra
R=C divided by 2 multiplied by pi.
Regards Richard U
2007-09-22 16:19:21 · answer #10 · answered by Anonymous · 0⤊ 0⤋
Radius = (Circumference ÷ (3.142/2))
2007-09-23 01:02:46 · answer #11 · answered by Norrie 7 · 0⤊ 0⤋