Vertical angle
01
垂直角, 对顶角
one of a pair of opposite angles made by two intersecting lines, which are always equal
例子
Vertical angles are always congruent to each other.
垂直角总是彼此全等。
The theorem stating that vertical angles are equal is a fundamental concept in geometry.
垂直角相等的定理是几何学中的一个基本概念。
