This design is in pastel colours with three rectangles and three triangles.
这个图案色彩柔和淡雅，有3个长方形和3个三角形。
《柯林斯英汉双解大词典》
2
Draw a house. Use only rectangles, squares and triangles.
画一个房子，只能用长方形、正方形和三角形来画。
3
Those pieces included small beds of roses and other items as well as a few dozen "nature carpets"—large rectangles decorated with foam pumpkins, cabbages, and watermelons.