Triangle Calculator

Enter the three side lengths:

units

Enter two sides and the included angle:

units

Enter two angles and the included side:

units

Enter two values for right triangle:

units

Triangle Visualization

Calculation Results

Area

6.00

Perimeter

12.00

Height

2.40

Type

Scalene

Detailed Results

Side a: 5.00 units

Side b: 4.00 units

Side c: 3.00 units

Angle A: 90.00°

Angle B: 53.13°

Angle C: 36.87°

About Triangle Calculator

Multiple Calculation Methods

Calculate triangle properties using different combinations of sides and angles: SSS (three sides), SAS (two sides and included angle), ASA (two angles and included side), and right triangle calculations.

Comprehensive Results

Get all triangle properties including area, perimeter, height, angles, side lengths, and triangle type classification (equilateral, isosceles, scalene, right, acute, or obtuse).

Visual Representation

See your triangle visualized with labeled sides and angles. The visual updates in real-time as you change input values.

Mathematical Formulas

Uses Heron's formula for area, Law of Cosines for angles, Law of Sines for side lengths, and Pythagorean theorem for right triangles.