Question

The area of a circle is $\pi a^2$, then the radius of the circle is ____.

• A. $a$
• B. $2a$
• C. $\frac{a}{2}$
• D. $a^2$

Answer 1

The correct option is A

$a$

Area of a circle = $\pi (\text{radius}{)}^2$

Given is $\pi (\text{radius}{)}^2=\pi a^2$

Radius = a