Circles:tangent

Two circles of unit radius have their center at (0,2) and (1,0) find the equation of their parallel common tangents.

1 Answers

Eqn of 1 tgt is xx1 + (y-2)(y1-2) = 1

Use dist from centre = radius to get other eqn

Solve both eqns to get (x1,y1)

Similarly find (x2,y2) for the other circle

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