Question

What is the area of this circle? Round your answer to the nearest hundredth. inside the circle is 20cm А. 31.42 square cm B. 62.83 square cm C. 314.16 square cm D. 628.32 square cm

Answer 1

You have the diameter of the circle is:

d = 20 cm

In order to calculate the area of the circle, use the formula for the area:

A = π r²

where π = 3.14 and r is the radius.

The radius is one half of the diameter:

r = 20 cm/2 = 10 cm

Next, replace the values of π and r into the formula for the area:

A = (3.1415) (10 cm)² = 314.16 cm²

Hence, the area of the circle is 314.16 cm²