File talk:Quadrilaterals.svg
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Why not just use the standard congruence hatch marks? Using colors seems like it would be hard to follow for people with colorblindness. 69.210.140.157 11:22, 3 October 2012 (UTC)
Why not just use the standard congruence hatch marks? Using colors seems like it would be hard to follow for people with colorblindness. 69.210.140.157 11:22, 3 October 2012 (UTC)[回复]