名词
中文翻译：正角
同义词：
['right angle', 'right-angled', 'orthogonal angle']
例句：
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1. Thearchitect designed the building with a cardinal angle of 90 degrees.
建筑师以90度的正角设计了这座建筑。
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2. The carpenter used a cardinal angle to join the wooden planks together.
木匠使用一个正角将木板连接起来。
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3. The engineer calculated the exact angle at which the beam would intersect the floor.
工程师计算了梁与地板相交的精确角度。