A parallelogram with four right angles is called a rectangle. In geometry, a rectangle is a quadrilateral with four right angles and opposite sides that are equal and parallel. This means that not only are the opposite sides of a rectangle equal in length, but they also run parallel to each other.
The properties of a rectangle include:
- All four angles are right angles (90 degrees).
- Opposite sides are equal and parallel.
- The diagonals bisect each other and are equal in length.
- It has two lines of symmetry.
Rectangles are commonly found in everyday objects such as doors, windows, and books. They are a fundamental shape in both geometry and real-world applications.