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The area of a square with side x is x2 SQUARE units.

A circle with diameter 1 unit, has an area of pi/4 square units.

Since the area of a square with side of 1 unit is 1 square unit, let us call the area of a circle of diameter 1 unit to 1 circular unit. That gives 1 circular unit = pi/4 square units.

So a square with sides of x units = x2 units = pi*x2/4 or pi*(x/2)2 units.

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13y ago

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