Answer: To find the third side of a triangle (there are two answers you could get), you need to use the Pythagorean formula: a^2+b^2=c^2. First answer, 3^2+5^2=c^2. Solve for c. c=5.83. The second answer, 3^2+b^2=5^2. Solve for b. b=4.
Here we have a system of equation like this: from the first equation we get: Substitute in the second equation we get: Substitute i the first equation again we get: We deduce that: A is bigger than B.