How do you find the length of the biggest side on a triangle when given the 2 other side?

To find the length of the largest side in a triangle when given the lengths of the other two sides, you can apply the triangle inequality theorem. This theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side. Therefore, the longest side must be less than the sum of the other two sides. If you denote the two given sides as (a) and (b), the longest side (c) must satisfy (c < a + b).