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Area and circumference of circles

Stuck? Read the notes

	Answers
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Find the areas of the shapes below. Don't forget the units in your answer.


1. Find the area of the circle above.
2. Find the circumference of the circle above.

3. Find the area of the circle above.
4. Find the circumference of the circle above.

A circle has radius 9 km.

5. Find its area.
6. Find its circumference.

A circle has diameter 24 mm.

7. Find its area.
8. Find its circumference.