Subcategories of Quadrilaterals

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