Subcategories of Quadrilaterals

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