Question

A triangle has two sides of lengths 5 and 12. What value could he length of the third side be

Answer 1

I don't know if its a right triangle and we are trying to find the length of the hypotenuse
but if it is, use Pythagorean Theory
c² = √a² + b²
c² = √12² + 5²
c² = √144 + 25
c² = √169

c=13

Answer 2

You would use the Pythagorean theorem which is A squared plus B squared equals C squared. The way you set it up would be 5 squared plus 12 squared equals C squared. Square the five and the 12 and then add Them and then take the square root of the solution which would be C squared and your answer would be 13