Question

Solve for pi : C = 2 pi r.

a. pi equals 2 times C over r
b. pi equals C over quantity 2 times r
c.pi equals C over r
d.pi equals r times C over 2

Answer 1

To solve for π in the circumference formula, divide the circumference, C, by 2 times the radius, r, which results in π = C / (2r).

Step-by-step explanation:

To solve for π (pi) in the equation C = 2 π r, where C is the circumference of a circle and r is the radius, we need to manipulate the equation to isolate π. Starting with C = 2 π r, you divide both sides by 2r to get π on its own:

C = 2 π r

π = C / (2r)

This corresponds to option b: π equals C over quantity 2 times r. The circumference formula for a circle can be remembered as being directly proportional to the radius and π.