Question

If the diameter of a circle is 8 cm, what is the area of the circle?

If the diameter of a circle is 8 cm, what is the area of the circle?

Answer 1

Area of circle=pi*radius^2=50.29 cm^2

Answer 2

The diameter is twice the radius.
If the diameter is 8 cm, then the radius is 4 cm.


`A=\pi r^2`
A - area, r - radius


`r=4 \ [cm] \\ \\ A=\pi * 4^2=16 \pi \approx 50.27 \ [cm^2]`

The area is 16π cm², or approximately 50.27 cm².