Triangle Circumradius Calculator
Find triangle circumradius R = abc / (4 × area).
Open toolTriangle Inequality Checker
Check whether three positive side lengths form a nondegenerate triangle. All lengths must use the same unit.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Check.
Your result
Enter your details
Result will appear here
How Triangle Inequality Checker works
Check whether three positive side lengths form a nondegenerate triangle.
All lengths must use the same unit. Area uses squared units and volume uses cubed units. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Each pair of sides must sum to more than the third. Equality is a degenerate line, not a triangle.
How to use Triangle Inequality Checker
Follow the labelled inputs.
Enter first side
Replace the example with first side. The field labels specify the expected format and units.
Input and settings
Tool result
Run, review and save
Select Check. Review the triangle validity verdict, then copy it or download the result text.
Review the details
Examples and uses for Triangle Inequality Checker
Check the supplied example
The starting example produces Valid nondegenerate triangle. Check whether three positive side lengths form a nondegenerate triangle.
Use your own inputs
Read the labels for first side and second side, third side. All lengths must use the same unit.
Record a reviewed result
Copy the triangle validity verdict into your working file. All lengths must use the same unit.
How to read the result
Read the triangle validity verdict with the input convention.
Check whether three positive side lengths form a nondegenerate triangle.
All lengths must use the same unit. Area uses squared units and volume uses cubed units. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Each pair of sides must sum to more than the third. Equality is a degenerate line, not a triangle.
Supported input and limits
Check the stated scope before you run it.
All lengths must use the same unit. Area uses squared units and volume uses cubed units. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Each pair of sides must sum to more than the third. Equality is a degenerate line, not a triangle.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolTriangle Inequality Checker: common questions
Answers about using Triangle Inequality Checker and understanding its results.
What assumptions and input limits apply?
All lengths must use the same unit. Area uses squared units and volume uses cubed units. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Each pair of sides must sum to more than the third. Equality is a degenerate line, not a triangle.
How can I save the output?
Use Copy result to copy the displayed text, or Download to save it as a text file. The tool runs in your browser and does not require an account.
Check with your input
Check the triangle validity verdict, then copy or download it.