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Ex 6.3, 1
Last updated at June 3, 2026 by Teachoo
Class 9
Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar
- Definition (and Quesitons)
- Perimeter of Different Shapes
- Perimeter of a Circle - C/D Ratio
- Pi is Irrational
- Length of an Arc of a Circle
- Problems, Puzzles, and Paradoxes on Perimeter
- Exercise Set 6.1
- Area of Square & Rectangle
- Area of a Parallelogram
- Area of a Triangle
- Heron's Formula
- Circumcircle and Incircle of a Triangle
- Brahmaguptaβs Formula for the Area of a Cyclic 4-gon
- Squaring a Rectangle
- Exercise Set 6.2
- Area of a circle
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Exercise Set 6.3
- End-of-Chapter Exercises
Transcript
Ex 6.3, 1 Find the area of a sector of a circle with radius 7 cm if the angle of the sector is 60^β. Given that, Radius = r = 7 cm & Angle of the sector = ΞΈ = 60Β° We know that, Area of sector of circle = π/(360Β°) Γ Οr2 = ππ/πππΓππ/πΓ(π)π = 1/6Γ22/7 Γ 49 = 1/6Γ 22 Γ 7 = 1/3Γ 11 Γ 7 = 77/3 = 25.666... cm2
