Three semicircles each of diameter 3 cm, a circle of diameter 4.5 cm and a semicircle of radius 4.5 cm are drawn in the given figure. Find the area of the shaded region.

A semicircle of radius 3 units is drawn on one edge of a right-angled triangle, and a semicircle of radius 4 units is drawn on another edge. The semicircles intersect on the hypotenuse of the triangle, as shown.What is the shaded area, in square units?

The figure shows two circles.The radius of the big circle is 3 times the radius of the small circle.The radius of the big circle is 42 cm. Find the area of the shaded part. Take π =  227

In the figure below not drawn to scale, AB = 28 cm. DE = 4 cm. CE = 16 cm. Find the area of the shaded part.

In the figure shown, O is the centre of the circle and AT is a tangent to the circle.Given that the radius of the circle is 4 cm and the length of the tangent is 9 cm, find the area shaded.Give your answer correct to 3 significant figures.

4. In the adjoining figure, PR = 6 units and PO = 8 units. Semicircles are drawn taking sides PR, RQ and PQ as diameters as shown in the figure. Find out the area of the shaded portion. (it = 3.14)​