False. square fit into the category of parallelogram because they fit all requirements but since a square is a parallelogram that means the parallelogram does not fit the requirements of a square.
Supplementary means it adds up to 180 degrees. So if one side is 31 degrees, you would need to subtract that from 180 to find the other side. ----------------------- 180 - 31 = 149 ----------------------- The other angle would be 149 degrees.
