Wednesday, August 27, 2008

Semiperimeter, Excircles, Incircle, Tangents

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

Triangle, Excircles, Incircle

See complete interactive proof with animation and key concepts at:
www.gogeometry.com/semiperimeterexcirclesinc1.htm

Level: High School, SAT Prep, College geometry