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An Introduction to quadrilaterals and shapes, including usage in proofs and coordinate geometry.
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Download Free Complete Geometry Special Quadrilaterals .pdf file
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Quadrilateral definitions, examples, characteristics at mathwords.com
Always Sometimes Never Quadrilateral Questions and other flash cards from quizlet.com
Quadrilaterals video and other geometry content from hippocampus.org
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Webcomic #123 (1-31-14) "Geometry re-Construction"
More webcomics, puzzles, and mathblogs
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Math Webcomic #45 "Country Western Night" featuring Sponge Bob Square Pants (8-11-12)
(Click right corner to view)
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