Cynthia Lanius' Lessons: Isosceles Triangle Puzzler

Cynthia Lanius

$pryamids$ Thanks to PBS for permission to use the Pyramid photo.

Isosceles Triangle Puzzler

If you need a definition

Mark the statements below always (T)rue or sometimes (F)alse.
If each of two isosceles triangles has an angle of 100 degrees, then the two isosceles triangles must be similar.

True False

If each of two isosceles triangles has an angle of 50 degrees, then the two isosceles triangles must be similar.
True False

Please explain your answers.

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Copyright 1997-2008 Cynthia Lanius

URL http://math.rice.edu/~lanius/Geom/isos.html