n.七边形，七角形

A heptagon has seven sides and seven angles.
七边形有七个边和七个角。
The floor tile is in the shape of a regular heptagon.
地砖是规则的七边形形状。
In geometry, a heptagram is a star polygon formed from the vertices of an irregular heptagon.
在几何学中，七角星是由一个不规则七边形的顶点构成的星形多边形。
The heptagonal prism is a polyhedron with two parallel heptagonal bases and seven rectangular faces.
七棱柱是一个多面体，有两个平行的七边形底面和七个矩形侧面。
The soccer field is marked with a heptagonal penalty area.
足球场上用七边形标出了罚球区。
The artist used a compass to draw a perfect heptagon for his composition.
这位艺术家使用了圆规在他的构图中画出了一个完美的七边形。
A heptagon can be divided into five triangles if you connect its opposite vertices.
如果将七边形的相对顶点连接起来，它可以被划分为五个三角形。
The honeycomb cell is a hexagon, but occasionally bees build cells in the form of a heptagon.
蜂巢中的蜂房通常是六边形，但偶尔蜜蜂也会建造七边形的蜂房。
The heptagonal symmetry of this pattern makes it visually striking.
这个图案的七边形对称性使其视觉效果十分引人注目。
The heptagonal number represents the sum of the first six positive integers plus one.
七边形数表示前六个正整数之和再加上一。