Vertical angles can be supplementary angles if the lines are perpendicular and then both of the vertical angles would be 90 digress.
They're supplementary
no
Perpendicular lines form right angles at their intersections.
count the corners! Penta=5, five sides=5 angles, five angles equal 5 intersections. Some of these may be perpendicular, but not necessarily.
Sure, as long as the two intersecting lines are perpendicular.
ya, they're perpendicular lines
yes
Not necessarily. A perpendicular to a sloped line will be sloped. It will be at right angles to the sloped line, though.
vertical angles
A vertical angle is perpendicular to a horizontal base and equals 90 degrees
The Vertical Angles Theorem says that a pair of vertical angles are always congruent.