Question

the area of a semicircle of a radius 4r is​

Answer 1

Hey here is ur answer

Answer 2

The area of a semicircle of radius 4r is 8πr²

Given :

A semicircle of radius 4r

To find :

The area of the semicircle

Formula :

The area of a semicircle of radius r

$\displaystyle \sf{ } = \frac{1}{2} \pi {r}^{2}$

Solution :

Step 1 of 2 :

Write down the radius of the semicircle

Here it is given that semicircle of radius 4r

Step 2 of 2 :

Find area of the semicircle

The area of the semicircle

$\displaystyle \sf{ } = \frac{1}{2} \pi {(4r)}^{2}$

$\displaystyle \sf{ } = \frac{1}{2} \times \pi \times 16 {r}^{2}$

$\displaystyle \sf{ } = 8\pi {r}^{2}$