To determine the values of M and N, we need to analyze the relationships created by the two parallel lines (a and b) and the transversal (c).
However, I do not have the diagram you mentioned, which is key for identifying the angles. Typically, when two parallel lines are cut by a transversal, certain angle relationships come into play, including corresponding angles, alternate interior angles, and consecutive interior angles.
If you can provide additional details about the angles M and N in relation to each other within the diagram, I can help calculate their values. Please specify whether M and N are corresponding angles, alternate interior angles, etc. Alternatively, if there are given angle measures in the diagram, please mention them for better assistance.