Answer:
*I need more detail* but if I guessed than the question is asking if the are equal triangles.
Δabc=Δnlm
Step-by-step explanation:
Draw out both triangles and label them as described in the question. If one angle of the triangles are 80° and 50° than the other angle has to be measured as 50° because all the angles have to add up to 180°. And both triangles are said to have angles 80° and 50°. The length of ac and ab are equivalent because it is an isosceles triangle and same goes for Δnlm.
