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Example 10 - Chapter 9 Class 7 Perimeter and Area

Last updated at July 4, 2023 by

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Example 10 Find the perimeter of the given shape (Fig 11.32) (Take Ο€ = 22/7).Here, Perimeter of given shape = 4 Γ— Length of curved blue line = 4 Γ— Circumference of half circle Let’s find circumference of half circle Circumference of half circle Diameter = 14 cm Radius = r = π·π‘–π‘Žπ‘šπ‘’π‘‘π‘’π‘Ÿ/2 = 14/2 = 7 cm Circumference of half circle = 1/2 Γ— Circumference of circle = 𝟏/𝟐 Γ— 2πœ‹r = πœ‹r = 22/7 Γ— 7 = 22 cm Now, Perimeter of given shape = 4 Γ— Circumference of half circle = 4 Γ— 22 = 88 cm Hence, perimeter of given shape is 88 cm

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.