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:

The measure of the angle at the top left corner measures 100°.

Step-by-step explanation:

Since we have given that

Fabric is cut in the shape of a parallelogram.

Since the angle at the bottom left corner = 80°

And we need to find the measure of the angle at the top left corner.

Since the angle at the bottom left and top left forms adjacent angles.

Bottom left + Top left = 180°

Hence, the measure of the angle at the top left corner measures 100°.