75-25 = 50 It looks like the sides are 25, 25, 25 so it is really equilateral.
If I thought that the side given 25 had the equal side then it would be 25 with 25 left over for the other side.
If I thought the given side, didn't have an equal side, I would have subtracted 25 and divided by 2 like I did originally.
Equilateral triangles have equal sides and equal angles. So.. each angle must be 60 degrees.
