△abc is similar to △lmn by the aa similarity postulate . the measure of ∠a is 57º and m∠c=2(m∠m).

△ABC is similar to △LMN by the AA Similarity Postulate . The measure of ∠A is 111º and m∠C=2(m∠M).

Since the Angle of A is 111 degrees.
Another angle, Angle of C is twice the angle of M.

Angle of A = Angle of C
2 (Angle of M) = Angle of C
2 (Angle of M) = 57
Angle of M = 28.5 degrees

I’m going to infer you said parallel.solve for yy= -1/2x+7/4lines that are parallel have the same slope, different y intercept.so we know m is -1/2then from there solve for y intercept.