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Triangle Classification by Sides and Angles — result sheet
Classify a valid triangle as equilateral, isosceles, or scalene and as acute, right, or obtuse.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Triangle inequality validates the sides; compare the largest side squared with the sum of the other two squares.
Side equality determines the side-based label, while the squared-side comparison determines the largest angle category without requiring inverse trigonometry.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Side A — minimum 1.0E-6; maximum 1000000
- Side B — minimum 1.0E-6; maximum 1000000
- Side C — minimum 1.0E-6; maximum 1000000
Worked example
| Input | Value |
|---|---|
| Side A | 3 |
| Side B | 4 |
| Side C | 5 |
Scalene right triangle.
Assumptions and limits
- All sides are positive and must satisfy the strict triangle inequality.
- A small tolerance is not substituted for exact input equality when classifying side lengths.
- The labels describe geometry and do not infer material or structural behavior.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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