Vertically opposite angles are the angles that are opposite each other when two lines cross. Vertical means they share the same vertex.
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Lines that form an X shape create vertical opposite equal angles
It can be almost any measure but the important thing to remember is that vertical angles are congruent, so any angle that is vertical to another has the same measurement as the angle it is vertical to.
Given two intersecting lines, the two angles opposite each other have the same measure and are congruent.
which pair of angles in the figure below are vertical angles ?
The side opposite the right angle is called the hypotenuse.