Geometry

Triangle Calculator

Calculate angles, sides, area, and perimeter of any triangle

How to Use
  1. Select whether you want to calculate the Area or the Perimeter.
  2. Enter the required dimensions for your selection.
  3. Click Calculate to instantly view the result.

Formula

Triangle formulas:

  • Area (A) = ½ × Base × Height
  • Perimeter (P) = Side A + Side B + Side C