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1. The square is divided into four equal parts by the equilateral triangle.
这个正方形被等边三角形分成四个相等的部分。
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2. The sides of the polygon are all equal, forming an equilateral triangle.
这个多边形的边都相等,形成一个等边三角形。
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3. The circle has a diameter of 12 units, and each side is an equilateral triangle witha base of 6 units.
圆的直径为12单位,每条边都是一个等边三角形,底边为6单位。