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March 4, 2015

March 4, 2015

Posted by **candace** on Sunday, January 9, 2011 at 4:24pm.

- geometry -
**Henry**, Monday, January 10, 2011 at 3:53pmDiameter = Length of a side. = X.

X^2 + X^2 = (Diag.)^2,

2X^2 = (Diag.)^2 = (20)^2,

2X^2 = 400,

X^2 = 200,

X = sqrt(200) = 14.14cm = Diameter.

r = 14.14 / 2 = 7.07cm.

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