Question

Circumference (rounding)

Answer 1

19.5

Explanation:

Circumference is radius multiplied by 2, then multiplied by pi.

3.1 × 2= 6.2

6.2 × π= 19.477 ≈ 19.5

π also equals 3.14

Answer 2

radius r = 3.1 in

diameter d = 6.2 in

circumference C = 19.4778745 in

area A = 30.1907054 in2