Q5. Let A, B be the centres of two circles of equal radii; draw them so that each one of them passes through the centre of the other. Let them intersect at C and D. Examine whether and are at right angles.
First, draw two circles of equal radii taking A and B as their centre and they intersect at C and D. Then, join AB and CD.
From the figure, AB and CD intersect at right angle with