Homework Help: Math

Posted by Satie on Friday, January 1, 2010 at 3:04pm.

A square has sides of 10 units. There is a diagonal that divides it into two triangles of an unknown value. What is the value of this line? The answer is 10 square root of 2, but I thought it would be ten (10^2+10^2=100, the sq. root of 100 is 10) Where does the square root of two come from? Thank you, Jiskha!

Math - bobpursley, Friday, January 1, 2010 at 3:09pm
10^2+10^2=200= 2*10^2

the square root of that is 10sQRT2

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