Subcategories of Quadrilaterals

Inscribed and Circumscrib...	Squares (5) Diagonals Area and Perimeter	Diagonals	Rectangles (4) Area and Perimeter Diagonals
Known Sides and 1 Known A...	Rhombi (11) Altitude Angle Measures Area and Perimeter Diagonals	Known Equations	Parallelograms (11) Altitude Diagonals Area and Perimeter Angle Measures
Known Equations	Trapezoids (13) Angle Measures Misc. Area and Perimeter Altitude	Known Diagonals and 1 Kno...	Kites (9) Diagonals Area and Perimeter Angle Measures
Angle Measures	Cyclic Quadrilaterals (3) Angle Measures Area and Perimeter Diagonals	Known Equations	General (12) Area and Perimeter Diagonals Angle Measures
Finsler-Hadwig Theorem	Misc. Quadrilaterals (1) Finsler-Hadwig Theorem