Question

How to find the area of the shaded region.

Answer 1

find the area of the circle, the subtract the area of the rectangle

you know that the diameter of the circle is 9 so that should help you get the area of the circle

then use phythagorean thereom to get the area of one triangle and multiply it times 2 to get the area of both triangles

the subtract the area if the circle and the area of the rectangle