Ex 6.1, 4
Last updated at May 29, 2026 by Teachoo
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Exercise Set 6.1
Ex 6.1, 1
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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
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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
Transcript
Ex 6.1, 4 Find the perimeter of a sector (i.e., the curved portion as well as the two straight portions) of a circle of radius 14 cm and sector angle 75Β°. Given Radius = r = 14 cm Angle = π = 75Β° Now, Perimeter of sector = Length of arc AB + OA + OB = Length of arc + 2 Γ Radius = ππ π Γ π½/(πππΒ° )+ππ = 2 Γ22/7 Γ 14 Γ (75Β°)/(360Β°)+2 Γ 14 = 2 Γ 22 Γ 2 Γ 15/72+28 = 2 Γ 22 Γ 2 Γ 5/24+28 = 22 Γ 5/6+28 = 11 Γ 5/3+28 = 55/3+28 = 18.33.. + 28 = 46.33.. cm
