Q7 of 23 Page 274

A is the centre of the circle and ABCD is a square. If BD = 4cm then find the radius of the circle.

Given, BD = 4cm


We know that “a square has equal diagonals” and BD is a diagonal.


AC, which is the radius of the circle, is also a diagonal of the square.


AC = BD = 4 cm


Thus, Radius of the circle = 4 cm


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