vertical angles are when you have an "x" made by intersecting lines and the angles in it are vertical angles. Opposite angles are when you have the x, the angles are on directly opposite sides.
--->x<---
those are opposite of each other. therefore they are opposite angles. the arrows are pointing at them
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vertical; straight up and down; upright; meeting a given line or surface at right angles.
Angles on opposite sides of the transversal and between the parallel lines
Intersects at a right angle, also vertical.
Perpendicular means 'at right angles to'.
There is no such word as perpundicular.Perpendicular means "at right angles" or "at 90 degrees". Sometimes it is used to refer to things that are vertical or upright, since these are perpendicular to the ground or base.