Answer:
∠ M = ∠ B
Step-by-step explanation:
SAS ( side- angle- side )
If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent.
The included angle is the angle formed by the two sides.
We have LM ≅ BC and MN ≅ AB
the included angles are ∠ M and ∠ B
Then to prove the triangles are congruent by SAS
∠ M = ∠ B
