Complete the following sentence. Triangles are congruent if they have the same __________.
A. size and name
D. shape and name
I chose all except C.
If two triangles share the same size they are congruent, and if they are the same name they are the same triangle.
But if the triangle is the same shape, then it could be a similiar triangle, not a congruent triangle. Unless the triangle has the same name, then it is still congruent and is the same triangle.