Question

In the ACB is the arc drawn by taking O as the centre and OA as the radius. Then find the area of the shaded region.

Answer 1

The area of sector which has 7 cm radius and 90° central angle =

Area of the right angled triangle AOB

\(=\frac{7\times7}{2}=24.5\)

Area of the shaded part = 38.455 – 24.5 = 13.965 cm²