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AMSCO Geometry

Chapter 9: Postulates & Theorems


Parallelogram opposite sides theorem

Parallelogram angles and theorems

Parallelogram diagonals theorem

Rectangle diagonals theorem

Parallelogram and rhombus theorem

Parallelogram opposite sides theorem converse

Parallelogram opposite angles theorem converse

Parallelogram supplementary angles theorem convers

Parallelogram diagonals theorem converse

Parallelogram and quadrilateral theorem

Isosceles trapezoid theorem

Isosceles trapezoid diagonals theorem

Trapezoid midsegment theorems