## Quadrilaterals

- Quadrilateral overview
- Quadrilateral properties
- Kites as a mathematical shape
- Quadrilateral types exercise
- Quadrilateral types
- Proof: Opposite sides of parallelogram congruent
- Proof: Diagonals of a parallelogram bisect each other
- Proof: Opposite angles of parallelogram congruent
- Quadrilateral angles
- Proof: Rhombus diagonals are perpendicular bisectors
- Proof: Rhombus area half product of diagonal length
- Area of a parallelogram
- Whether a special quadrilateral can exist