Triangle Inequality Calculator
Check Three Sides
Find Valid Range for Third Side
Formula
a + b > c AND a + c > b AND b + c > a
Frequently Asked Questions
What is the triangle inequality theorem?
The triangle inequality theorem states that the sum of any two sides of a triangle must be greater than the third side. All three conditions must hold: a+b>c, a+c>b, b+c>a.
How do you classify a triangle by its sides?
Equilateral: all three sides equal. Isosceles: exactly two sides equal. Scalene: all three sides different.
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