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.

The circle below has center O, and its radius is 9m. Given that =m∠AOB40°, find the area of the shaded region and the length of the arc ADB.

The circle below has center O, and its radius is 8yd. Given that =m∠AOB150°, find the length of the arc AB and the area of the shaded region.Give exact answers in terms of π, and be sure to include the correct units in your answer.

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.

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)​

An equilateral triangle ABD is inscribed in a circle as shown in the figure. AC is a diameter of the circle. If the radius of the circle is 10 cm, what is the area of the shaded portion? Options243.7 cm2221.4 cm2273.1 cm2192.4 cm2