How do we find the area of a circle?

For you to find the area of a circle you only need to know the appropriate formula. The formula to find the are of a circle is "pi times the radius of the circle to the second power".

In the circle world, you will also have to find the circumference. the circumference is how long the circle is, around itself. the formula to find the circumference of a circle is "pi times the diameter" of the circle.

Problem1: find the circumference of a circle with radius of 5.
Problem 2: what's the area of a circle with a diameter of 25pi?


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