Problems on Circles V: External and Internal Common Tangents
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This Demonstration shows the internal and external common tangents to two circles.
Contributed by: Jaime Rangel-Mondragon (August 2008)
Open content licensed under CC BY-NC-SA
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"Problems on Circles V: External and Internal Common Tangents"
http://demonstrations.wolfram.com/ProblemsOnCirclesVExternalAndInternalCommonTangents/
Wolfram Demonstrations Project
Published: August 22 2008