They can have any name that you want!
Consecutive angles of a parallelogram are supplementary.
Consecutive angles in a parallelogram are supplementary.
Yes, any two angles in a parallelogram that share a common side are supplementary.
Congruent.
Opposite angles of a parallelogram are congruent.
No. The adjacent angles are supplementary.
No. All linear pair angles are supplementary, but supplementary angles do not have to be a linear pair.
Supplementary angles are any angles in which their degrees add to a sum of 180o. In the related links you will find an example of Supplementary angles.
Angles that are congruent and supplementary must be right angles.
Supplementary angles - two angles that add up to 180 degrees. No matter how large or small angles 1 and 2 on the left become, the two angles remain supplementary which means that they add up to 180°. By the way, supplementary angles do not need to be adjacent angles(angles next to one another) if it doesnt add up to 180 then they are not supplementary angles, but if they do then they are supplementary angles.
A parallelogram with 4 right angles is a rectangle.
Yes, adjacent angles are supplementary; however, opposite angles are not.