Exercise 2.13 - Construct three orthogonal circles

Construct three circles, each one meeting the other two at right angles. (We say that two circles meet at right angles if the radii of the two circles to a point of intersection make right angles.) (Par = 10.) Solution by E. Contreras Dongo 6 circles + 2 lines = 8 steps
For a proof consider the squares AGBE, BHDI, AJKD