Triangle Inequality Theorem Calculator

Test whether three lengths can form a triangle. The triangle inequality requires the sum of any two sides to be strictly greater than the third.

Frequently Asked Questions

What is the triangle inequality?

For three side lengths to form a triangle, the sum of any two must be strictly greater than the third. Equivalently, the largest side must be less than the sum of the other two.

What happens if equality holds?

If the sum equals the third side, the three points are collinear - a degenerate (flat) triangle with zero area.

Does the inequality extend to higher dimensions?

Yes - it is the defining property of a metric space. For any three points a, b, c the distance from a to c is at most the sum of distances from a to b and b to c.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.