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Area of Circles

This topic covers the computation of areas of circles. We will also learn to estimate the area of a circle by using a grid.

Topic: Area of a Circle

  • The area of a circle is equal to pi times the radius squared.
    Area of a circle = ∏ x (Radius)2

  • ∏ is called pi. ∏ is approximately equal to 22/7 or 3.14

  • Diameter = 2 x Radius

Topic: Word Problems on Area

  • The area of a circle is equal to pi times the radius squared.
    Area of a circle = ∏ x (Radius)2

  • ∏ is called pi. ∏ is approximately equal to 3.14 or 22/7

  • Diameter = 2 x Radius

Topic: Area of a Circle - Using Grid

  • To estimate the area of the circle drawn on grid, count the square units enclosed by the circle

  • The radius of a circle is the length of the line from the center to any point on its edge
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