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A Theorem about Two Tangent Circles


	Let A and C be the centers of two tangent circles. Draw a line from a point E through the intersection of the two circles and let that line intersect the circles at B and D. Then AB is parallel to CD.


	Contributed by: Jay Warendorff

For more information see Two Touching Circles.

Parallel (Wolfram MathWorld)

Tangent Circles (Wolfram MathWorld)

"A Theorem about Two Tangent Circles" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/ATheoremAboutTwoTangentCircles/

Contributed by: Jay Warendorff

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