Which triangles can be split into two isosceles triangles? (Source: Bo Green, Abilene Christian University, Abilene, Tex.) © Copyright 1998 Stan Wagon. Reproduced with permission.

Which triangles can be split into two isosceles triangles?

(Source: Bo Green, Abilene Christian University, Abilene, Tex.)

© Copyright 1998 Stan Wagon. Reproduced with permission.