This calculator displays 2 scenarios

1) Enter 3 sides of a triangle, and it will determine if the side lengths satisfy the properties of the triangle inequality and form a triangle

2) Enter 2 sides of a triangle, and this will determine an acceptable range for the length of the 3rd side of a triangle so that the 3rd side respects the Triangle Inequality.

This calculator has 3 inputs.

1) Enter 3 sides of a triangle, and it will determine if the side lengths satisfy the properties of the triangle inequality and form a triangle

2) Enter 2 sides of a triangle, and this will determine an acceptable range for the length of the 3rd side of a triangle so that the 3rd side respects the Triangle Inequality.

This calculator has 3 inputs.

- Sum up two sides of the triangle. They must be greater than the 3rd side
- The sum of any two sides of a triangle is greater than or equal to the third side

For more math formulas, check out our Formula Dossier

- inequality
- a relation which makes a non-equal comparison between two numbers or other mathematical expressions.

>, <, ≤, ≥ - triangle
- a flat geometric figure that has three sides and three angles
- triangle inequality
- the sum of any two sides of a triangle is greater than or equal to the third side