名词
中文翻译：极角三角形
同义词：
['polar triangle', 'polar trigonometric function例句：1. The polar triangle is the shape formed by three sides of a right-angled triangle when one side is extended indefinitely.（极角三角形是由直角三角形的三条边延伸至无限远时形成的图形。）']
例句：
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1. The polar triangle is the shape formed by three sides of a right-angled triangle when one side is extended indefinitely.
极角三角形是由直角三角形的三条边延伸至无限远时形成的图形。
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2. In physics, the polar triangle is used to describe the orientation and properties of vectors.
在物理学中，极角三角形用于描述向量的方向和属性。
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3. The polar triangle can be used to calculate the area of a circle by finding the length of theradius.
极角三角形可以用来计算圆的面积，方法是找到半径的长度。