Quadrilateral Calculator
About Quadrilaterals
A quadrilateral is a polygon with four sides and four vertices. There are several special types of quadrilaterals:
- Rectangle: All angles are 90°, opposite sides are equal
- Square: All sides are equal, all angles are 90°
- Parallelogram: Opposite sides are parallel and equal
- Rhombus: All sides are equal, opposite angles are equal
- Trapezoid: One pair of parallel sides
Formulas
- Area of Rectangle: A = length × width
- Area of Square: A = side²
- Area of Parallelogram: A = base × height
- Area of Rhombus: A = base × height = (d₁ × d₂)/2
- Area of Trapezoid: A = (base₁ + base₂) × height/2
- Perimeter: Sum of all sides