2007-08-19 11:57:01 · 5 answers · asked by Cass 1 in Science & Mathematics ➔ Mathematics
Actually, the formula for the circumference of a circle is
(1) C=πd
where d is the diameter... and the diameter is twice the radius. Um in mathematics, that’s (2) d=2r
How do you solve it?
Suppose I gave you the equation
A = bc
And suppose I asked you to solve for b. Somehow you would have to get rid of the factor c on the right side. Subtracting c wouldn’t help much because, instead of having b of ‘em on the right side. HINT: multiply both sides by the reciprocal of c
Ok, you have the same problem with C=πd
When you get something that looks like d = something… substitute the right side of equation (2) above everywhere you see the letter d. Then do the same thing that you did to solve for d.
2007-08-19 12:17:13 · answer #1 · answered by gugliamo00 7 · 0⤊ 0⤋
Just post it up on Yahoo Answers
2007-08-19 19:10:58 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Simply divide both sides of the equation by pi.
C / pi = pi·r / pi = r
James :-)
2007-08-19 19:02:59 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Yes to what gugliamo said. Or maybe it should say:
C = 2pie(r)
That's also a formula for circumference.
2007-08-19 19:41:46 · answer #4 · answered by jsardi56 7 · 0⤊ 0⤋
use matlab, pie is a function in matlab
2007-08-19 19:01:25 · answer #5 · answered by vlee1225 6 · 0⤊ 0⤋