Question 1006478
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7 and 11.


Seven and Eleven.


{{{7^2 + 11^2}}} = 170 = {{{2*(6^2 + 7^2)}}} = 2*(36 + 49) = 2*85.


In a parallelogram the sum of the squares of the diagonals equals the sum of the squares of the four sides.

See the lesson &nbsp;<A HREF=>The length of diagonals of a parallelogram</A>&nbsp; in this site.