Right angle
01
直角, 90度角
an angle measuring exactly 90 degrees
例子
To construct a square, each corner must form a perfect right angle.
要构造一个正方形，每个角必须形成一个完美的直角。
In geometry class, students learn to identify shapes based on the presence of right angles.
在几何课上，学生们学习根据直角的存在来识别形状。
