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40. Find the area of the shaded region15cm8cm20cm |
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Answer» ong>Answer: 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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