Question 1006473
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Theorem 3. Diagonals of a rhombus are perpendicular.
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See the lesson &nbsp;<A HREF=http://www.algebra.com/algebra/homework/Parallelograms/Diagonals-of-a-rhombus-are-perpendicular.lesson>Diagonals of a rhombus are perpendicular</A>&nbsp; in this site.