find the perimeter of a square circumscribing a circle of radius a cm

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Solution

Given, radius of circle = a cm
So, diameter of circle = 2a cm
Now, square circumscribing a circle of radius a cm.
So, Side of square = diameter of circle = 2a cm
Thus,
Perimeter of square = 4(side of square) = 42a = 8a cm
Hence, Perimeter of a square is 8a cm.

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