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

Last updated at August 14, 2026 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
Teachoo · Class 7 Explore Class 7

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 is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.