Yolanda is making a banner for a school pep rally. she cuts fabric in the shape of a parallelogram. the angle at the bottom left corner measures 80°. the measure of the angle at the top left corner must measure °.

100°

Step-by-step explanation:

The bottom left and top left angle in a parallelogram are adjacent angles.

From the properties of parallelogram, we know adjacent angles are supplementary, this means they "add up to 180°"

Thus, if one angle is 80, the other angles would be 100 (to make it total 180).

So, top left corner angle measures 100°

i think the answer is b.

step-by-step explanation:

not 100% sure though.

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