名词
中文翻译：五角形
同义词：
['pentagon', 'pentagonal', 'hexagon']
例句：
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1.The pentagon is a shape with five sides.
五边形是一种有五个边的图形。
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2. The pentagon is used in many architectural designs.
五边形在许多建筑设计中被使用。
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3. The pentagon is also known as the "star of David."
五边形也被称为“大卫之星”。