1. isosceles triangles are similar.
a) always
b) sometimes
c)never
2. why are all equilateral triangles similar?
a) aaa similarity postulate
b) asa similarity postulate
c) sss similarity postulate
d) sas similarity postulate

1. C never. never because isosceles triangles are similar if a base angle of one is congruent to a base angle of another.

2.A AAA Similarity Postulate. An equilateral triangle is equal on each side, also AAA Similarity Postulate is were it is all equal all around

I hope this helped!