<PRE><B>Question 145829</B>
Solve for the unknown side in the following right triangle. (side AC is the hypotenuse.) Round your answer to two places, where applicable.Side AB ? Side BC12 Side AC 19

From Pythagorean theorem we know:
(AC)^2 = (AB)^2 + (BC)^2
plugging in what was given:
(19)^2 = (AB)^2 + (12)^2
(19)^2 = (AB)^2 + (12)^2
361 = (AB)^2 + 144
361 - 144 = (AB)^2
217 = (AB)^2
14.73 = (AB)</PRE>