∵ Two circles of equal radii intersect each other orthogonally. Then R is mid point of PQ. 
and PR=O1R=O2R PR=21(0−0)2+(1+1)2=1 ∴ Distance between centres =1+1=2.
Two circles with equal radii are intersecting at the points (0,1) and (0,-1) . The tangent at the point (0,1) to one of the circles passes through the centre of the other circle. Then the distance between the centres of these circles is:
Held on 11 Jan 2019 · Verified 6 Jul 2026.
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