Question

Circumference (rounding)

Answer 1

40.8 cm²

Explanation:

Use the equation C=2πr to solve

1. Find the values needed. C=2π·6.5 (radius is half of diameter)
2. Solve your equation. 40.84=2π·6.5
3. Round. 40.84≈40.8

Answer 2

41

Explanation:

13 cm × 3.14 ( pi )

will give you

40.82 = 41