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Question

In Figure , common tangents AB and CD to the two circles with centres O1 and O2 intersect at E. Prove that AB = CD.
261045_4ea7cf4255eb43dd99026fd94264c90d.png

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Solution

From the given figure, AB and CD are common tangents on both the circles. AB and CD intersect at E.
Now, EA=EC (Tangents drawn on circle from same point)
EB=ED (Tangents drawn on circle from same point)
EA+EB=EC+ED
AB=CD

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