Posted by Macy on Monday, January 7, 2013 at 4:24pm.
Since this forms a right-angle triangle, we can use the Pythagorean Theorem.
a^2 + b^2 = c^2
30^2 + 40^2 = c^2
900 + 1600 = c^2
2500 = c^2
50 = c
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