Area of Circle Worksheet

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A circle is a geometric figure which is formed when a curve completes a rotation and where the starting and the ending points of the curve meet together. A circle is a geometric shape which has no vertices like any other geometric shape. Area of a circle is the portion covered inside the circle bounded by its curve.

Example 1: Calculate the area of the circle if the diameter of the circle is 14m.

Given diameter of the circle, d = 14m

In a circle, diameter is the line passing from one point to another point on the curve and passing through the center of the circle.

Radius of the circle is the line joining from the center of the circle to any other point on the curve of the circle.

Hence radius, r = diameter/2 = 14m/2 = 7m

Area of the circle formula, A = π * (radius)2

Hence A = (3.14) * (7m)2 = 153.86m2

Area of the given circle, A = 153.86m2

 
Example 2: Calculate the area of the circle if the diameter of the circle is 20m.

Given diameter of the circle, d = 20m

Radius of the circle is the line joining from the center of the circle to any other point on the curve of the circle.

Hence radius, r = diameter/2 = 20m/2 = 10m

Area of the circle formula, A = π * (radius)2

Hence A = (3.14) * (10m) 2 = 314m2

Area of the given circle, A = 314m2

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