Posted by jessica on Monday, August 23, 2010 at 3:38am.
why it is not possible for a right triangle to have the following three sides: 12 feet, 18 feet, and 14 feet.
I need help because I am confuse. Thanks in advance.

math  drwls, Monday, August 23, 2010 at 5:50am
It is possible to have a triangle with those side lengths, but it would not be a RIGHT triangle, because the Pythagorean theorem is not obeyed.
12^2 + 14^2 does NOT = 18^2
The hypotenuse (longest side) would have to be sqrt340 = 18.439
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