angle symbol

角符号是一种数学符号，位于字母之前，表示由两条直线，射线或线段组成的几何角度。角符号看起来像是一个大写的，斜体的L。

下面的示意图描述了角度的作用，在途中，直线L与直线M平行，可以用角度判断直线是否平行，描述为：平行线段同位角必相等。

可以用数学符号“=”表示两个角度一致。

The angle symbol is a mathematical symbol that is placed ahead of character s, usually uppercase italic letters representing spatial points, to describe a geometric angle formed by the intersection of two lines, line segments, or rays. The symbol looks like a skewed, uppercase, sans serif letter L ( ).

The illustration shows an example of the use of the angle symbol (along with some other mathematical symbols) in a geometric scenario. The statement at the bottom translates to, "Lines L and M are parallel if and only if angle ABC is congruent to angle DEF ."

When two angles are congruent, they have equal measure, so an equals sign (=) is sometimes used in place of the congruence symbol. Thus we can say that in this example, ABC = DEF .