Triangle Calculator
Calculate a triangle's area, perimeter and angles from its three sides.
Assumptions used in this calculation
- Valid triangle: Assumes the three side lengths satisfy the triangle inequality; inputs that can't form a triangle are rejected.
About this calculator
Solves a triangle from its three side lengths using Heron's formula (area) and the law of cosines (angles), and classifies it by side and angle type, consolidating the master prompt's separate 'Right Triangle Calculator', since this classification identifies right triangles directly.
Worked example
3-4-5 triangle
Result: Area = 6, right triangle
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