Question

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?
A. PI=C+2r
B: C-2r
C: PI=2R/C
D: PI/C/2R

...?

Answer 1

Answer:  D. $\pi=\dfrac{C}{2r}$

Step-by-step explanation:

Given : The formula to find the circumference is given by :-

$C=2\pi r$, where r is the radius of the circle.

To find the formula for $\pi$ , we need to divide 2r on both of the sides in the above equation, we get

$\pi=\dfrac{C}{2r}$ , where  r is the radius of the circle.

Hence, the correct formula for $\pi$ : Option D $\pi=\dfrac{C}{2r}$

Answer 2

The best and most correct answer among the choices provided by your question is none of the above.

The formula for π (pi) of the circle in terms of the circumference and radius is: Pi = C/2r.


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