Triangle Side Inequalities

Learn the fundamental rule that determines whether three sides can form a triangle.

Triangle Inequality Theorem

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

For sides a, b, c: a + b > c AND a + c > b AND b + c > a

Test any three side lengths to see if they can form a valid triangle. Get step-by-step verification of all three inequality conditions.