1
a polygon with [number] sides
描述边数时用 with，如 a polygon with six sides。
An octagon is a polygon with eight sides.
八边形是有八条边的多边形。
多边形；多角形
polygons — plural of polygon
先理解核心含义，再看它在真实句子里的用法。
多边形；多角形
polygon
An octagon is a polygon with eight sides.
八边形是有八条边的多边形。
A plane figure bounded by edges that are all straight lines.
多边形(由直线边围成的封闭平面图形)
a closed plane figure bounded by straight sides
The boundary of such a figure.
A figure comprising vertices and (not necessarily straight) edges, alternatingly.
A triangle is a polygon with three sides.
三角形是有三条边的多边形。
The students drew different polygons and compared their angles.
学生们画了不同的多边形并比较它们的角。
To find the area of this polygon, divide it into smaller triangles.
要求这个多边形的面积，可以把它分成几个较小的三角形。
描述边数时用 with，如 a polygon with six sides。
An octagon is a polygon with eight sides.
八边形是有八条边的多边形。
这是说明边数的常用句型；复数主语用 have。
This polygon has five sides.
这个多边形有五条边。
用系动词 be 加 a polygon 表示某图形属于多边形。
A triangle is a polygon, but a circle is not.
三角形是多边形，但圆形不是。
Not this
The map is divided into polygon areas.
Use this
The map is divided into polygonal areas.
polygon 是名词，表示“多边形”；修饰名词表示“多边形的”应用形容词 polygonal。
Not this
There are several polygon on the board.
Use this
There are several polygons on the board.
polygon 是可数名词，复数形式为 polygons，与 several 搭配时必须加 -s。
Not this
Polygon is a closed plane figure.
Use this
A polygon is a closed plane figure.
polygon 是可数名词单数，泛指时前面需加冠词 a；中文没有冠词概念，因此容易遗漏。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
正多边形
A square is a regular polygon with four equal sides.
正方形是有四条等边的正多边形。
凸多边形
In a convex polygon, every interior angle is less than 180 degrees.
在凸多边形中，每个内角都小于180度。
不规则多边形
An irregular polygon can have sides of different lengths.
不规则多边形的边长度可能不同。
多边形网格
The 3D model is built from a detailed polygon mesh.
这个三维模型由精细的多边形网格构成。
多边形工具
Use the polygon tool to draw a five-sided figure.
使用多边形工具绘制一个五边形。
Use polygons naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把poly想成“多”，gon想成“角”，多条边围成的封闭图形就是多边形。
语域：neutral 常见场景：geometry class、math textbook、computer graphics 该词是几何学中的标准术语，语气中性，多用于数学教材、课堂以及计算机图形学等场景。日常口头描述一般形状时较少用，较常直接说 shape。整体没有明显的正式或非正式色彩。
这些以 -gon 结尾的词中，hexagon、pentagon、octagon、decagon 与 polygon 押韵（重读音节元音均为 /ɑ/，后面都是 /ɡɑn/）。注意 wagon 拼写以 -gon 结尾，但发音是 /ˈwæɡən/，并不押韵。
Dictionary facts from ECDICT, WIKTIONARY.