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Objective: I know how to calculate the area of a circle.

The area of a circle is size of the surface of the circle. The formula is

π*r*^{2}.

The area of the circle is expressed in square units. Since the formula is only given in terms of radius, remember to change from diameter to radius when necessary.

Read the lesson on area of circle if you need to learn how to calculate the area of a circle.

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