Sometimes but not always.
No, right angles are 90 degrees, supplementary and vertical angles are 180 degrees.
Vertical angles are always, by definition, congruent. Note: If the two vertical angles are right angles then they are both congruent and supplementary.
Vertical angles can be supplementary angles if the lines are perpendicular and then both of the vertical angles would be 90 digress.
The term that best describes a pair of vertical angles that are also supplementary is "linear pair." Vertical angles are formed by the intersection of two lines and are equal in measure, while supplementary angles add up to 180 degrees. However, vertical angles alone are not necessarily supplementary; they only form a linear pair when they are adjacent and their measures sum to 180 degrees.
vertical and supplementary
Supplementary.
supplementary angles add up to 180 degrees
No, they are usually not.
If the lines are perpindicular then each pair of vertical angles are supplementary
vertical angles and supplementary.
Yes.
Yes, they can, if they are both 90 degrees.