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Vertical angle
01
垂直角, 対角
one of a pair of opposite angles made by two intersecting lines, which are always equal
vertical angle
n
例
Vertical angles are always congruent to each other.
In the diagram, angle A and angle B are vertical angles and thus have the same measure.
If one vertical angle is 45 degrees, the opposite vertical angle must also be 45 degrees.
When proving the equality of vertical angles, you can use the properties of intersecting lines.
If one vertical angle is 45 degrees, the opposite vertical angle must also be 45 degrees.
