名词
中文翻译：直角
同义词：
['right angle', 'right-angled triangle']
例句：
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1.The architect designed the building with a perfect right angle.
建筑师设计这座大楼时，考虑了完美的直角。
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2. The math teacher explained the concept of a right-angled triangle to the students.
数学老师向学生们解释了直角三角形的概念。
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3. The engineer used a right-angled triangle to measure the length of the beam.
工程师使用直角三角形来测量梁的长度。