Question

A circle is inscribed in a square whose side is $8$. What is the area of the circle, in terms of $\pi$?

• A. $4\pi$
• B. $8\pi$
• C. $16\pi$
• D. $18\pi$

Answer 1

The correct option is C $16\pi$

Let the radius of circle be $r$
The side length of square is $8=2r$, which implies $r=4$
Area of circle is $\pi r^2=16\pi$