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Vertical angle
01
对顶角, 垂直角
one of a pair of opposite angles made by two intersecting lines, which are always equal
Example
Vertical angles are always congruent to each other.
对顶角总是互相相等。
The theorem stating that vertical angles are equal is a fundamental concept in geometry.
关于对顶角等于的定理是几何学中的一个基本概念。
