1st take the area of the circle.
To find the area of the circle, equation is πr²
(considering π=3.14 , and the radius to be 8.5 from 1/2 of the diameter)
πr²= 3.14× (8.5)²
=227 (rounded off value)
then find the are of the figure in the middle. To find the area of a triangle with a 90° angle,use the equation = 1/2 × base × height
1/2× 8× 15=60
now since there are 2 of those triangles inside the circle, multiply it by 2
60×2= 120
now reduce the area of the 2 triangles from the area of the circle
227-120=107