Triangle Vertices Calculator


Triangle Vertices Calculator

Hello there, geometry enthusiasts! Are you ready to dive into the thrilling world of triangle vertices calculation? Buckle up for an exciting journey through the land of angles and vertices. Just a heads up though, don’t take any acute angles to heart!

Triangle Vertices Calculation Formula

The formula to calculate the vertices of a triangle, given its side lengths, is as follows:

Vertex A = (a^2 - b^2 + c^2) / (2c)
Vertex B = (b^2 - a^2 + c^2) / (2c)
Vertex C = (c^2 - a^2 + b^2) / (2b)

Categories of Triangle Vertices Calculations

Category Range
Acute Triangle All vertices < 90°
Right Triangle One vertex = 90°
Obtuse Triangle One vertex > 90°

Example Calculations

Triangle Side Lengths Calculation Result
Bob’s Triangle 3, 4, 5 (9-16+25)/(2*5) = 90° Right Triangle
Alice’s Triangle 2, 2, 2 (4-4+4)/(2*2) = 60° Acute Triangle

Calculation Methods

Method Advantages Disadvantages Accuracy
Manual Calculation No tools required Prone to human error High if done correctly
Using a Calculator Quick and easy Requires a calculator Very High

Evolution of Triangle Vertices Calculation

Period Changes
Ancient Greece First known use of geometry
17th Century Introduction of Cartesian coordinates
Modern Day Use of calculators and computers

Limitations of Triangle Vertices Calculation

  1. Accuracy depends on measurements: The more inaccurate your side length measurements, the less accurate your vertices calculation.
  2. Not suitable for non-Euclidean geometry: This method applies to Euclidean geometry only.

Alternative Methods

Method Pros Cons
Trigonometry Can solve for unknown sides and angles Requires knowledge of trigonometry

Frequently Asked Questions

  1. What is a vertex in a triangle? – A vertex is a corner where two sides meet.
  2. How do I calculate the vertices? – You can use the formula given above.
  3. What is an acute triangle? – An acute triangle is a triangle where all vertices are less than 90 degrees.
  4. What is a right triangle? – A right triangle is a triangle where one vertex is exactly 90 degrees.
  5. What is an obtuse triangle? – An obtuse triangle is a triangle where one vertex is more than 90 degrees.
  6. Can I use this formula for non-Euclidean geometry? – No, this formula applies to Euclidean geometry only.
  7. What is the best method to calculate triangle vertices? – It depends on your needs. Manual calculation is more reliable but requires more effort, while using a calculator is quick and easy.
  8. What is the role of side lengths in triangle vertices calculation? – The side lengths determine the vertices of the triangle using the given formula.
  9. What are the limitations of triangle vertices calculation? – The accuracy of calculation depends on the accuracy of your measurements, and it’s not suitable for non-Euclidean geometry.
  10. What are the alternative methods to calculate triangle vertices? – Other methods include using trigonometry which can solve for unknown sides and angles, but it requires knowledge of trigonometry.


  1. U.S. Department of Education – Provides resources on geometry and mathematics.
  2. National Institute of Standards and Technology – Offers standards for accurate measurements.