Subcategories of Quadrilaterals

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