Respuesta :
Supplementary angles will always add up to 180. If you had a straight line, and you drew another line across that line, the two angles on either side of that line would add up to 180 because a flat line is equal to 180 degrees.
Answer:
m∠L + m∠M = 180 degrees
Step-by-step explanation:
Supplementary angles add upto 180 degrees.
Since angles L and M are supplementary, the sum the two angles must be 180 degrees.
m∠L + m∠M = 180 degrees
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