Ex 9.2, 7 - Chapter 9 Class 7 Perimeter and Area

Last updated at Dec. 16, 2024 by

Ex 9.2, 7 - Find the perimeter of the adjoining figure, which is a - Ex 9.2

part 2 - Ex 9.2, 7 - Ex 9.2 - Serial order wise - Chapter 9 Class 7 Perimeter and Area

Remove Ads

Transcript

Ex 9.2, 7 Find the perimeter of the adjoining figure, which is a semicircle including its diameter. Diameter = AB = 10 cm Radius = r = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = 10/2 = 5 cm Now, Perimeter of semicircle = Length of semicircle part + Length of AB Thus, Perimeter of semicircle = 𝟏/𝟐 × 2𝜋r + 2r = 𝜋r + 2r = 3.14 × 5 + 2 × 5 = 314/100 × 5 + 10 = 𝟑𝟏𝟒/𝟐𝟎 + 10 = 157/10 + 10 = 15.7 + 10 = 25.7 cm ∴ Perimeter is 25.7 cm

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo