If you are asking if they form a 180o angle, the answer is yes.
Supplementary angles.
Supplementary angles.
they form a straight line
Supplementary angles
They are supplementary angles.
No.
a straight line
Yes because angles on a straight line add up to 180 degrees
a line that intersects to form four right angles is a perpendicular
Parallel lines do not meet and so do not form angles.
180o or a line
Lines that always form right angles when they meet are perpendicular lines. The first line is perpendicular to a second line.