名词
中文翻译：五角形
同义词：
['pentagon', 'pentagram例句：1. The pentagon is a shape with five sides.（五边形是一种有五个边的图形。）']
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 was used in the design of the new bridge.
五边形被用于新桥的设计中。
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3.The pentagon is often used as a symbol for symmetry and balance.
五边形常被用作对称和平衡的象征。