Chapter Six:  
Quadrilaterals

Geometry   Notes

Chapter  6

Section  6.1
Section  6.2
Section  6.3
Section  6.4
Section  6.5
Section  6.6
Section  6.7

Geometry Contents

Take notes on the following topics.

Section 6-3  Proving That a Quadrilateral Is a Parallelogram

Theorem 6-5

If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram.

Theorem 6-6

If one pair of opposite sides of a quadrilateral is both parallel and congruent, then the quadrilateral is a parallelogram.

Theorem 6-7

If both pairs of opposite sides of a quadrilateral are congruent, then the quadrilateral is a parallelogram

Theorem 6-8

If both pairs of opposite angles of a quadrilateral are congruent, then the quadrilateral is a parallelogram