Question

what is the method to solve it​

Answer 1

hope it is helpful and opt d

Answer 2

Step-by-step explanation:

as you know, the angle in a semicircle is 90.

so, the triangle is a right angled triangle.

so find the third side which will give you the radius of the circle .

and finally, find the area of the semicircle and area of triangle and subtract to get the area of shaded portion.

HOPE IT HELPS YOU mark it as brainliest.