Asked by Phalgun

Two circles with centers a and b of radii 3 cm and 4 cm res , intersecting at two points c and d such that ac and bc are two tangets of the circles, then length of common chord .
Answered by Steve
how can a line though the center (ac) be a tangent to the circle?
Answered by Phalgun
IT IS TANGENT TO OTHER CIRCLE.


Answered by Steve
Hmmm. OK. In that case, the two circles must be orthogonal to each other. That is, if you draw triangle acb and adb, each is a 3-4-5 right triangle. The common chord is just twice the altitude to the hypotenuse, which I'm sure you can find.
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