Triangle Calculator

Developed by Hemant Parashar, B.Sc.

Calculate any unknown sides or angles of a triangle. Enter three known values (at least one must be a side).

General Purpose Disclaimer

This tool is developed for educational and quick reference purposes. Calculations should be verified independently for critical applications.

Triangle Values

Side a (opposite A)

Side b (opposite B)

Side c (opposite C)

Angle A (degrees)

Angle B (degrees)

Angle C (degrees)

Results

Side a

Side b

Side c

Angle A

Angle B

Angle C

Perimeter

Area

How to Use the Triangle Calculator

Computes angles, sides, area, and perimeter of any triangle given three known properties. Follow these instructions to compute your results accurately:

Input at least three values (including at least one side length) to solve the triangle.
Double-check all inputs to prevent calculation errors.
Results are processed instantly in your browser via client-side scripts.

Mathematical Formulas & Calculation Principles

The underlying calculations rely on the following mathematical logic:

            Law of Cosines: c² = a² + b² - 2ab * cos(C)
          

Frequently Asked Questions (FAQ)

Q: Can this solve obtuse triangles?

A: Yes, using the Law of Sines and Law of Cosines, this calculator can solve any valid oblique or obtuse triangle.

This tool was developed and verified by Hemant Parashar, B.Sc. Graduate and part-time blogger, to provide free, high-accuracy mathematical resources for educational use. Complex parameters were reviewed by Hemant Parashar (B.Sc. Graduate & Lead Developer).