Suppose angle L and angle M are supplementary angle Angle L measure of angle M

Question

Suppose angle L and angle M are supplementary angle. angle L measure 38 the measure of M is

Answer 1

Supplementary angles add to 180^ο. So if one angle is 38^ο you should be able to figure out the other one.

Answer 2

Supplementary angles means that the angles add up to 180 degrees.

One way this occurs is on a straight line, as in this rough sketch:

We can set up an equation based on this:

M + 38 = 180

      -38     -38            subtract 38 from both sides

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M = 142 °     Answer