vertical angle

"Vertical angles" are important in geometry because they are always equal to each other.

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Definition

B2Geometry

(technical, academic)Any of the opposite angles formed by two intersecting lines, sharing a common vertex but opening in opposite directions.

Example

When two lines cross, they form two pairs of vertical angles.
The vertical angles are equal in measure.

Similar

Terms that have similar or relatively close meanings to "vertical angle":

plane angle angle shot angle shooting angle for right angle angle quote angle bar alternate angles angle of attack critical angle first angle projection third angle projection angle of incidence complementary angles supplementary angles angle bracket