Question

The radius of a circle is 4 inches. How would you calculate the circumference?

A. π · 4² in.²
B. 2 · π· 4 in.
C. π · 8² in.²
D. 2· π · 8 in.

Answer 1

Explanation:

the formula for the circumference of a circle is

2×pi×r

so, B is correct : 2×pi×4 in

Answer 2

b) 2 · π· 4 in.

Circumference of a circle: 2 • π • r

B. 2 · π· 4 in.