no
Vertical angles can be supplementary angles if the lines are perpendicular and then both of the vertical angles would be 90 digress.
Yes, all perpendicular angles form 90 degree angles.
Sure, as long as the two intersecting lines are perpendicular.
ya, they're perpendicular lines
Not necessarily. A perpendicular to a sloped line will be sloped. It will be at right angles to the sloped line, though.
A vertical angle is perpendicular to a horizontal base and equals 90 degrees
They're supplementary
Their vertical opposite angles are equal
The term parallelogram refers to a four sided geometrical figure (in other words, a quadrilateral) in which there are two sets of parallel sides. The angles can vary; they can be right angles, or they can be acute or obtuse angles, as long as there are two sets of parallel sides. Angles are not said to be vertical to each other. Angles can be perpendicular to each other, but not vertical or horizontal. If angles are perpendicular, then they are right angles, in other words, 90o angles. Lines can be vertical, but angles can't.
Vertical angles can be acute, right (if the intersecting lines forming them are perpendicular) or obtuse.
Perpendicular if they form right angles if not they form vertical opposite equal angles
Only if the angles formed are right angles otherwise they form vertical opposite equal angles