Question

#20-9: Find the are of a circle that has a diameter of 20.2 inches. Use 3.14 for pi and round to the nearest hundredth.

Answer 1

Answer:

  320.31 in²

Step-by-step explanation:

The area of a circle can be computed from ...

  A = (π/4)d²

Filling in the numbers and doing the arithmetic, we get ...

  A = (3.14/4)(20.2 in)² ≈ 320.31 in²

Answer 2

Answer:

320.47in² or 320.47 (to the nearest hundredth)

Step-by-step explanation:

The area of a circle that has a diameter of 20.2 inches is 320.47in².

Formulas: A=πr2  and d=2r

A=1/4πd2=1/4·π·20.22≈320.47387in²