Triangle Height, Side and Angle Calculator

What you want to calculate is:
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What is the unit of angle? or or

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A Triangle Height, Side, and Angle Calculator is a tool that helps you determine missing measurements in a triangle when certain values are known. This calculator is useful for solving geometry problems, trigonometry applications, and real-world scenarios like construction, engineering, and navigation.


What is it?

A Triangle Height, Side, and Angle Calculator computes unknown values of a triangle given some known parameters. Depending on the given data, it can find:

  • Side lengths (using the Law of Cosines or Pythagorean theorem)
  • Angles (using the Law of Sines or Cosines)
  • Height (altitude from a vertex to the opposite side)

Why use it?

  • Quick and accurate calculations: Avoid manual trigonometry and reduce errors.
  • Useful in real-world applications: Engineering, surveying, architecture, physics, and more.
  • Helps with learning: Great for students studying geometry or trigonometry.
  • Saves time: Quickly find missing dimensions without extensive calculations.

How does it work?

The calculator uses different mathematical formulas based on what is provided:

  1. Given two angles and one side → Uses the Law of Sines to find missing sides.
  2. Given two sides and one angle → Uses the Law of Cosines to determine the missing side or angles.
  3. Given all three sides → Uses Heron’s Formula to find the area and can derive height from it.
  4. Given base and area → Uses the area formula to determine the height.

Formulas used:

  • Law of Sines:
  • Law of Cosines:
  • Area of Triangle:
  • Heron’s Formula for Area:

When to use it?

  • Solving triangle-related math problems (homework, exams, research)
  • Construction and architecture (roof calculations, land measurements)
  • Navigation and surveying (GPS, triangulation, distance measurements)
  • Physics and engineering (forces, motion, angles in structures)