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OpenStudy (anonymous):
The length of a diagonal of a square is 8 mm. Find the perimeter of the square.
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OpenStudy (jdoe0001):
|dw:1382226096722:dw| use the 45-45-90 rule http://nanharbison.com/sats/math_images/45-45-90.gif to find "x"
OpenStudy (anonymous):
I don't get it :/
OpenStudy (jdoe0001):
well. do you see the ratios? is a square, so the triangles it'll make are 45-45-90 thus, notice the ratios labeled, what does it show for the "slanted leg" there?
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