heptagons 

  1. 名詞
heptagon複數: 七角形, 七邊形

    
                        
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例句

                

                    
    
                                                    
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                                Instead, they are molecular cages made up of hexagons, heptagons and triangles.                            
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                                Figurate numbers representing heptagons (including seven) are called heptagonal numbers.                            
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                                From the collars hang heptagons , the seven sides representing the union of seven councils.                            
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                                Using these theorems he derived explicit formulas for triangles and tetragons and also gave formulas for pentagons, hexagons, and heptagons .                            
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                                The open quartic may be obtained (topologically) from the closed quartic by puncturing at the 24 centers of the tiling by regular heptagons , as discussed below.                            
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