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Example 13 - Chapter 9 Class 7 Perimeter and Area
Last updated at August 14, 2026 by Teachoo
Chapter 9 Class 7 Perimeter and Area
Concept wise
- Basic Definitions
- Square and Rectangle
- Converting Square to Rectangle
- Area of parallelogram
- Area of triangle
- Circumference of circle
- Perimeter of a combination of shapes
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Area of circle
- Area of combination of figures - two circles, circle and square
- Finding Area of rectangle with path outside/inside
- Finding Area of rectangle with cross roads
- Finding Area of rectangle with triangle
Transcript
Example 13 Diameter of a circular garden is 9.8 m. Find its area.Diameter = 9.8 m Radius = r = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = (𝟗.𝟖)/𝟐 = 98/20 = 𝟒𝟗/𝟏𝟎 m Area of circle = 𝜋r2 = 𝟐𝟐/𝟕 × (𝟒𝟗/𝟏𝟎)^𝟐 = 22/7 × 49/10 × 49/10 = 𝟐𝟐/𝟏 × 𝟕/𝟏𝟎 × 𝟒𝟗/𝟏𝟎 = (𝟏𝟓𝟒 × 𝟒𝟗)/𝟏𝟎𝟎 = 7546/100 = 75.46 m2 ∴ Required Area is 75.46 m2
