各种不同形状用英语怎么说

形状 (shapes) 有许多种，如圆形 (circle), 正方形 (square), 长方形 (rectangle), 三角形 (triangle), 梯形 (trapezoid), 椭圆形 (ellipse) 等。这些词来源于希腊语 (Greek) 和拉丁语 (Latin)。

例句：

The circle is a basic shape in geometry. (圆形是几何学中的基本形状。)
The square is a regular polygon with four equal sides. (正方形是四条相等边的正多边形。)
The rectangle has opposite sides that are equal in length. (长方形有相对的相等长度的边。)
A triangle has three sides and three angles. (三角形有三条边和三个角。)
The trapezoid has two parallel sides. (梯形有两条平行边。)
An ellipse is a closed curve that is symmetrical about its two foci. (椭圆形是一种封闭曲线，在其两个焦点处对称。)