Question

What is the area of a circle with a diameter of $16$?

• A. $8$ $\pi$
• B. $16$ $\pi$
• C. $64$ $\pi$
• D. $128$ $\pi$
• E. $256$ $\pi$

Answer 1

The correct option is C $64$ $\pi$

Given, diameter $=d=16$

We need to find area of circle.

Area of circle $=\pi r^2$

Therefore, radius $=r=\frac{16}{2}=8$
Area of the circle $=\pi r^2=\pi (8{)}^2=64\pi$