Math
Classifying Triangles Calculator
Classify a triangle by its sides and angles.
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Classify any triangle two ways: by its side lengths and by its largest angle.
The math behind it
By sides: all equal = equilateral, two equal = isosceles, none equal = scalene. By angles: compare the longest side squared with the sum of the other two squared (Pythagorean comparison).
Worked Example
Sides 3, 4, 5: scalene and right (since 25 = 9 + 16).Frequently Asked Questions
Can a triangle be both?
Yes — e.g. a triangle can be isosceles and right at the same time.
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