The 80-80-20 Triangle

Is there anything else that could be said about the 80-80-20 triangle?

http://www.cut-the-knot.org/triangle/80-80-20/index.shtml

Problem 358. Isosceles triangle 80-80-20, Circle, Angles, Congruence.

http://gogeometry.com/problem/p358_isosceles_triangle_80_80_20_congruence.htm

Problem 274: Isosceles Triangle, 80-80-20, Angles

http://gogeometry.com/problem/p274_isosceles_triangle_80_80_20_angles.htm

http://mathcircle.berkeley.edu/BMC4/Handouts/geoprob.pdf

http://math.stackexchange.com/questions/6942/finding-an-angle-within-an-80-80-20-isosceles-triangle