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Answered

The formula for the circumference C of a circle with radius r is C = 2πr. Which of the following is a formula for π (pi) of the circle in terms of the circumference and radius?

API=C+2r
BC-2r
CPI=2R/C
DPI/C/2R

Verified Answer :

W0lf93

the answer:
the main condition can be found one of the following given methods:
if A = BCD, if we want to find the value of B, so B = A /CD, the similar method can be applied to find the value of C an D. These are C= A/ BD and D = A /CB
in our case we have C = 2Pi R, if we want to find the value of Pi, it is Pi = C / 2R
the true answer is D

frika

The formula for the circumference C of a circle with radius r is

\(C = 2\pi r.\)

Now you should express \(\pi\) in terms of C and r. Divide the previous equation by 2r:

\(C = 2\pi r/:2r,\\ \\\pi =\dfrac{C}{2r}.\)

Answer: correct choice is D.

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