Which of the following is the correct formula for finding the area of a circle?

Question

A: A = C2 ÷ 4πA = πd * 2

B: A = 2πr

C: A = πr * 2

D: A = πd

Answer 1

The correct formula for finding the area of a circle is D) A = πd.

This formula states that the area (A) of a circle is equal to the product of the radius (r) squared and pi (π), or A=πr². Another common formula is A=πd²/4, which derives from the fact that the diameter (d) is equal to twice the radius (d=2r).