长方形用英语怎么说

长方形用英语说作 rectangle.
这个词来源于拉丁语，rectangle 是由两个词 rectus 和 angulus 组成的，它们的含义分别是 "straight" 和 "angle"。因此，rectangle 可以翻译为 "straight angle"，指的是由直角构成的四边形。
例句：
The floor is made up of small rectangles of different colors.
The artist drew a rectangle on the canvas to serve as the outline for the building.
I measured the dimensions of the rectangle and found that it was 10 inches by 15 inches.