Answer:
A = 177 cm²
Step-by-step 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:
[tex]A=\pi r^2[/tex]
Substitute:
[tex]A=\pi(7.5)^2=56.25\pi\ cm^2[/tex]
[tex]\pi\approx3.14[/tex]
Then
[tex]A\approx(56.25)(3.14)\approx177\ cm^2[/tex]
