# A Theorem about Two Tangent Circles

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram CDF Player or other Wolfram Language products.

Requires a Wolfram Notebook System

Edit on desktop, mobile and cloud with any Wolfram Language product.

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 (March 2011)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

For more information see Two Touching Circles.

## Permanent Citation

"A Theorem about Two Tangent Circles"

http://demonstrations.wolfram.com/ATheoremAboutTwoTangentCircles/

Wolfram Demonstrations Project

Published: March 7 2011