Q4 of 55 Page 1

Find the perimeter (in cm) of a square circumscribing a circle of radius a cm.


Given: Radius of the circle = r = a cm


To find Perimeter of the square.


Since diameter of the circle is equal to the side of the square, therefore, side of the square = 2r = 2a cm a


Now, perimeter of the square = 4 × (Side)


Thus, perimeter of the square = 4(2a) cm


= 8a cm


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