Heptagon
01
七边形, 七角形
a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles
例子
X-ray crystallography revealed the molecular framework contained multiple rings incorporating pentagons and intersecting heptagons.
X射线晶体学揭示了分子框架包含多个环，这些环结合了五边形和相交的七边形。
