What shape is 80,100,100,80 degree

I believe it is a parallelogram.

Reasons:

1. It is a quadrilateral. Quadrilaterals have a total amount of 360 degrees. 80+100+100+80=360

2. It has oposite sides that are equal

3. If you look at a parallelogram it has two obtuse angles and two acute.

100 = obtuse angle 80 = acute angle