Rectangle is a quadrilateral with four right angles.
In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°).
The term "rectangle" also refers to:
1. A rectangular shape in general
2. A rectangular object or structure
3. In computer graphics, a rectangular area of pixels