Visual illustration

Let ABC be a triangle of sides a, b, c and semiperimeter s. Represent s, (s-a), (s-b), (s-c).

See complete interactive proof with animation and key concepts at:

www.gogeometry.com/semiperimeterexcircles1.htm

Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

## Thursday, August 21, 2008

### Semiperimeter and excircles of a triangle

Labels:
circle,
congruence,
excircle,
semiperimeter,
tangent

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