If a right triangle is similar to a right triangle, which of the other triangles must also be a similar triangle?
What is the main difference between a right triangle and an isosceles triangle?
A right triangle has to have a angle and an isosceles triangle has to have equal, base angles.
An isosceles triangle has to have a angle and a right triangle has to have equal, base angles.
right triangle is similar to a 
right triangle, which of the other triangles must also be a similar triangle?