Talk:Internal Angles of Square

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Isn't this just a definition? I mean, the square has right angles and congruent sides. We have the case of the rhombus and the difference is definition. Right? Is there need of a proof?

--JRigo 20:48, 14 September 2011 (CDT)

Yes there is. --prime mover 00:20, 15 September 2011 (CDT)