名词
中文翻译：等弧
同义词：
['equilateral arc', 'isosceles arc', 'scalene arc']
例句：
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1. The circle hasa radius of 5 units, so it has an equal arc length of 20 units.
这个圆的半径是5单位，所以它的等弧长是20单位。
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2. The triangle has an equal arc ratio of 3:4:5, which means that the sides are in the ratio of 3:4:5.
这个三角形的等弧比为3:4:5，这意味着边长的比例为3:4:5。
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3. In a circle with a radius of 10 units, the circumference is equal to the area, as the arc length and the arc area are both proportional to the radius squared.
在一个半径为10单位的圆中，周长等于面积，因为弧长和弧面积都与半径平方成正比。