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Quadrilateral proofs & angles (K-A)

S#	Lecture	Course	Institute	Discipline
1	Proof: Diagonals of a parallelogram (K-A)	Quadrilateral proofs & angles (K-A)	Khan Academy	Basic and Health Sciences
2	Proof: Opposite angles of a parallelogram (K-A)	Quadrilateral proofs & angles (K-A)	Khan Academy	Basic and Health Sciences
3	Proof: Opposite sides of a parallelogram (K-A)	Quadrilateral proofs & angles (K-A)	Khan Academy	Basic and Health Sciences
4	Proof: Rhombus diagonals are perpendicular bisectors (K-A)	Quadrilateral proofs & angles (K-A)	Khan Academy	Basic and Health Sciences
5	Whether a special quadrilateral can exist (K-A)	Quadrilateral proofs & angles (K-A)	Khan Academy	Basic and Health Sciences

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