The angles of what?
name all vertcal angles name all vertcal angles
alternate angles
90 degree angles
right angles or 90 degrees
A diagonal joining opposite angles is the principal diagonal. It may or may not bisect the angles, and that does not affect its name.
Supplementary Angles
Complementary angles
They are supplementary angles.
Right angles. Also known as 90 degree angles.
a pretty wierd shape
Supplementary angles