# Annular area

The square with side a = 1 is inscribed and circumscribed by circles. Find the annular area.

Result

S =  0.785

#### Solution: Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...): Be the first to comment! #### To solve this example are needed these knowledge from mathematics:

Pythagorean theorem is the base for the right triangle calculator.

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