名词
中文翻译：三角形
同义词：
['triangle', 'angle', 'vertex']
例句：
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1.The triangle is the shape of a three-sided polygon with three sides meeting at a common point.
这个三角形是具有三条边且三边在一点相交的多边形。
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2. The triangle inequality states that the sum of the lengths of any two sides of a triangle must be greater than the length of the remaining side.
三角形不等式表明，三角形任意两边之和必须大于第三边的长度。
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3. In trigonometry, the trigonometric functions are used to calculate angles and distances in a plane figure.
在三角学中，正弦、余弦和正切函数用于计算平面图形中的角和距离。