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Last updated at Dec. 12, 2018 by Teachoo
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Ex 11.3, 7 Find the perimeter of the adjoining figure, which is a semicircle including its diameter. Diameter = AB = 10 cm Radius = r = ๐ท๐๐๐๐๐ก๐๐/2 = 10/2 = 5 cm Perimeter of semicircle = Length of semicircle part + Length of AB = 1/2 ร 2๐r + 2r = ๐r + 2r = 3.14 ร 5 + 2 ร 5 = 314/100 ร 5 + 10 = 314/20 + 10 = 157/10 + 10 = 15.7 + 10 = 15.7 + 10 = 25.7 cm โด Perimeter is 25.7 cm
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