40. Find the area of the shaded region
15cm
8cm
20cm
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Given : AC = 20 , AB =15 and o is the center of the circle
To find : area of the shaded region
Solution: AC = 20cm
AB = 15cm
BC is Diameter as it passes through O centre of the circle
Hence angle BAC is right angle
=》BC² = AB² + AC² = 20² + 15²
=》BC = 25 cm
Diameter = 25 cm
Radius = 25/2 cm
Area of semicircle = (1/2)22/7 (25/2)²=625 /8 =245.4cm²
Area of right angle = (1/2) * 15 * 20 = 150 cm²
area of the shaded region = 245.4 - 150 = 95.4cm²
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