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Use half of the square ( cut by the diagonal ) and the Pythagorean theorem. You are now working with a right triangle ( according to the drawing you should have made ) looking for the hypotenuse. and.....
c2 + b2 = c2
a = 6.5
b = 6.5
c = hypotenuse
c2 = 6.52 + 6.52
c = sqrt(6.52 + 6.52)
= 9.2
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Earn +20 ptsQ: What is the diagonal measurement of 6.5 x 6.5 square?
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