Pythagorean theorem help

Mathematics
Tutor: None Selected Time limit: 1 Day

A graphic artist wants to double the area of a square that is 12 cm on a side. What is the length of the new square?

I don't understand how this is done.
Nov 15th, 2014

The area of a square = 12^2 =144

The area of new square = 144 * 2 =288

The side of the new square = sqrt(288) =12 * sqrt(2) =12*1.414= 16.97 cm

Nov 15th, 2014

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Nov 15th, 2014
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