A square circumscribes a circle of radius 5 cm . Find the length of the diagonal of a square Share with your friends Share 1 Anuradha Sharma answered this Radius of circle = 5 cmSo diameter = 10 cmNow diameter of circle will be same as that of side of square.So side of square = 10 cmNow we know that diagonal of square with side a = a2 cmSo diagonal of square = 102cm 8 View Full Answer