Subcategories of Quadrilaterals

Known Coordinates	Squares (5) Area and Perimeter Diagonals	Known Equations	Rectangles (4) Area and Perimeter Diagonals
1 Known Angle	Rhombi (11) Diagonals Angle Measures Altitude Area and Perimeter	Known Equations	Parallelograms (11) Altitude Angle Measures Diagonals Area and Perimeter
Length of the Median	Trapezoids (13) Altitude Area and Perimeter Angle Measures Misc.	1 Known Side and 3 Known ...	Kites (9) Diagonals Angle Measures Area and Perimeter
Area and Perimeter	Cyclic Quadrilaterals (3) Area and Perimeter Angle Measures Diagonals	2 Known Sides and 3 Known...	General (12) Angle Measures Diagonals Area and Perimeter
Finsler-Hadwig Theorem	Misc. Quadrilaterals (1) Finsler-Hadwig Theorem