Answer:
Triangle C and Triangle D
Step-by-step explanation:
If you look closely at all of the different triangles, you can see that there are two pairs of congruent triangles.
Triangle A and Triangle E are congruent, both being right triangles and approximately the same size.
Triangle B and Triangle F are congruent, as both of them are isosceles triangles, and again, the same size.
The two that remain, Triangles C and D, are both scalene triangles, but they are not congruent to one another. Triangle C clearly has a smaller obtuse angle than Triangle D.
Hope this helps!
