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  1. Chapter 11 Class 7 Perimeter and Area
  2. Serial order wise

Transcript

Ex 11.3, 7 Find the perimeter of the adjoining figure, which is a semicircle including its diameter. Diameter = AB = 10 cm Radius = r = ๐ท๐‘–๐‘Ž๐‘š๐‘’๐‘ก๐‘’๐‘Ÿ/2 = 10/2 = 5 cm Perimeter of semicircle = Length of semicircle part + Length of AB = 1/2 ร— 2๐œ‹r + 2r = ๐œ‹r + 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 โˆด Perimeter is 25.7 cm

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.