Burt says:
I have drawn a triangle.
One side is 2" long and the angles on either side of that
side are 50 degrees and 30 degrees.
Wally, you draw a triangle with the same two properties.
Wally says:
My triangle will be congruent to yours, because all
triangles that have those three properties must be
congruent.
Is Wally correct to say that all triangles with these
three properties must be congruent?