Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Ex 9.2, 2 (b) - Chapter 9 Class 7 Perimeter and Area
Last updated at July 4, 2023 by Teachoo
Ex 9.2
Ex 9.2, 1 (a)
Ex 9.2, 1 (b) Important
Ex 9.2, 1 (c)
Ex 9.2, 2 (a) Important
Ex 9.2, 2 (b) Important You are here
Ex 9.2, 2 (c)
Ex 9.2, 3
Ex 9.2, 4 Important
Ex 9.2, 5 Important
Ex 9.2, 6
Ex 9.2, 7 Important
Ex 9.2, 8
Ex 9.2, 9 Important
Ex 9.2, 10 Important
Ex 9.2, 11
Ex 9.2, 12 Important
Ex 9.2, 13 Important
Ex 9.2, 14
Ex 9.2, 15
Ex 9.2, 16 Important
Ex 9.2, 17 Important
Transcript
Ex 9.2, 2 Find the area of the following circles, given that: (b) diameter = 49 mDiameter = 21 cm Radius = r = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = 𝟒𝟗/𝟐 m Now, Area of circle = 𝜋 r2 = 𝟐𝟐/𝟕 × (𝟒𝟗/𝟐)^𝟐 = 22/7 × 49/2 × 49/2 = 11/7 × 49/1 × 49/2 = 11/1 × 7 × 49/2 = (77 × 49)/2 = 𝟑𝟕𝟕𝟑/𝟐 = 1886.5 m2 ∴ Required area is 1886.5 m2
