document.write( "Question 386988: show that a rectangle is a square if the diagonals are perpnicular \n" ); document.write( "

Algebra.Com's Answer #273557 by richard1234(7193) $\"\"$ $\"About$

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Just show that the four triangles inside the rectangle are congruent, then you're done, because the corresponding sides will be the sides of the rectangle which will be equal. \n" ); document.write( "

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