If two of three angles match, all angles match and the triangles are similar.
The third angle of triangle 1 is 180° - 100° - 43° = 37°. Triangle C has angles that match these.
The third angle of triangle 2 is 180° - 73° - 62° = 45°. Triangle B has angles that match these.
The third angle of triangle 3 is 180° - 73° - 37° = 70°. Triangle D has angles that match these.
The third angle of triangle 4 is 180° - 110° - 43° = 27°. Triangle A has angles that match these.
The third angle of triangle 5 is 180° - 43° - 28° = 109°. None of the given triangles match this.
