Proving Quadrilaterals

Proving Quadrilaterals

Author: Jonathan Heeren
Description: Know and apply properties of congruent and similar figures to solve problems and logically justify results. 

a) I can recognize congruent figures and justify

    congruency of two triangles.

b) I can recognize similar figures.

c) I can calculate lengths in similar figures using

    proportional reasoning including real-world


d) I can logically justify the similarity of two triangles.

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these are the notes for proving quadrilaterals, please copy them into your notes.

How to prove a quadrilateral is a parallelogram

Example of proof of a parallelogram

Quad Proof with notes

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Quadrilateral Proof

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Group Proof Paper

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Quad Proof with algebra

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Quadrilaterals review Key

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