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
When you cant divide it to get the original number
29/ 3 = 9.666 so you would have 9 whole sheets of paper since you can not have half a sheet according to the question
The answer is negative 5. Hoped this helps. Please mark me as brainliest if I get it right.
P= 16 over 3 this is the straight forward answer
