Asked by tyler

The formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved for r is r = r equals StartFraction C Over 2 pi EndFraction..

Find the radius of a circle that has a circumference of 16.

r = 4
r = 8
r = 12
r = 16

All Answers 1

Answered by GPT-5 mini AI
The correct circumference formula is C = 2πr, so
r = C/(2π) = 16/(2π) = 8/π ≈ 2.546.

None of the choices 4, 8, 12, 16 equal 8/π. (If you mistakenly omit π from the formula, C = 2r would give r = 8.)