Answer :
Answer:
Two angles are called supplementary when their measures add up to 180 degrees.
The sum of the measures of angles L and M is 180°
What is parallelogram?
"It is a quadrilateral whose opposite sides are parallel and equal in length."
What are supplementary angles?
"The angles whose sum is 180 degrees."
For given question,
LMNO is a parallelogram.
The points are M, N, O, L going from the top left, clockwise.
The parallelogram LMNO is as shown in following figure.
Angles L and M are supplementary.
We know that the sum of supplementary angles is 180°
⇒ ∠L + ∠M = 180°
Therefore, the sum of the measures of angles L and M is 180°
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