1 Answer

PhoticSphere · Answer 1 · 2020-11-02T10:27:29+0000

Answer:

A = 177 cm²

Explanation:

A diameter is two times longer than a radius. Therefore, if the diameter

d = 15cm, then the radius r = (15cm) : 2 = 7.5cm.

The formula of an area of a circle:

$A=\pi r^2$

Substitute:

$A=\pi(7.5)^2=56.25\pi\ cm^2$

$\pi\approx3.14$

Then

$A\approx(56.25)(3.14)\approx177\ cm^2$