Quick answer
A rectangle is a quadrilateral with four right angles and equal opposite sides.
- Main formula
- Area = b x h, perimeter = 2(b + h), diagonal = √(b² + h²).
- Quick example
- Write the known measurements first, substitute them in the formula and keep the units.
Definition
A rectangle is a quadrilateral with four right angles and equal opposite sides.
Main properties
- It is useful for modeling surfaces, grids and area problems.
- Measurements must use the same unit before calculating.
- Draw a quick sketch to identify each value.
Formula
Area = b x h, perimeter = 2(b + h), diagonal = √(b² + h²).
Example method
Read the problem, mark the known measurements, choose the formula and simplify the result step by step.