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Triangle Calculator – Solves for a triangle's area, perimeter, and un...

The Triangle Calculator solves for a triangle's area, perimeter, and unknown sides or angles. This Triangle Calculator applies the standard mathematical formula for this calculation, returning an exact result with the steps shown. Use it for homework verification, quick calculations, or understanding how the formula works.

The formula behind this calculator: Area = ½ base x height, or uses the law of sines/cosines for non-right triangles. As a practical example: A triangle with a 10-unit base and 6-unit height has an area of 30 square units. All results are calculated instantly in your browser — no data is stored or transmitted.

Triangle Calculator FAQ

What does the Triangle Calculator calculate?

Solves for a triangle's area, perimeter, and unknown sides or angles.

Does this follow standard order of operations?

Yes — all calculations follow PEMDAS/BODMAS: parentheses, exponents, multiplication/division, then addition/subtraction.

Is this suitable for checking homework or coursework?

Yes, as a verification tool. Understanding the method yourself is still important for learning.

Does this work on mobile?

Yes — fully responsive and optimised for smartphones, tablets, and desktop browsers.