Question

How do I determine if three side lengths make a triangle?

Answer 1

Explanation:

The sum of the two shortest sides must be greater than the longest side.

a + b > c

For example, a 3-4-5 triangle works because 3 + 4 > 5.

However, a 3-4-7 triangle is impossible because 3 + 4 is not greater than 7.