Sunday, November 16, 2008

Elearn Geometry Problem 208: Triangle, Excircles, Angles, 360 degrees

Right triangle

See complete Problem 208 at:
gogeometry.com/problem/p208_triangle_excircles_angles.htm

Triangle, Excircles, Angles, 360 degrees. Level: High School, SAT Prep, College geometry.

1 comment:

  1. with the exteror angles of ABC ,and isoscele triangles like BEF we have:
    alpha = 180-(B/2+C/2)
    beta = 180-(C/2+A/2)
    gamma = 180-(A/2+B/2)
    sum = 3.180-180=360
    .-.

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