Question

Area of the given figure is .

• A. $\frac{1}{2}\pi r^2$
• B. $\pi r^2$
• C. $2\pi r^2$

Answer 1

The correct option is A $\frac{1}{2}\pi r^2$

The given figure is a triangle with base length as $\pi r$ and height as $r$.

We know that the area of a triangle is $\frac{1}{2}\times Base\times Height$.

Therefore the area of the given triangle will be
= $\frac{1}{2}\times \pi r\times r$
= $\frac{1}{2}\pi r^2$