1.

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:

Answer»

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:



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