Pythagorean Theorem Calculator Using HTML, CSS and JavaScript with Source Code

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Welcome to the Pythagorean Theorem Calculator! This interactive web app makes solving right-angle triangle problems effortless. Whether you're a student learning geometry, a teacher preparing lessons, or just someone who needs quick calculations, our tool helps you find missing side lengths with precision. Simply enter your known values, and the calculator instantly computes the result while displaying a dynamic visual representation of your triangle.

Designed for simplicity and clarity, the calculator supports two modes—finding the hypotenuse or a missing leg—and keeps a history of your past calculations for easy reference. With a clean, modern interface and responsive design, it works seamlessly on both desktop and mobile devices. Dive in and explore how the Pythagorean theorem comes to life with real-time visualization and intuitive controls!

You may also check this simple HTML, CSS and JavaScript project:

Features:

  • Dual Calculation Modes – Find the hypotenuse or a missing leg.

  • Interactive Triangle Visualization – Dynamic SVG drawing that scales with input values.

  • Calculation History – Stores previous results with timestamps.

  • Copy Results – Easily copy calculations to the clipboard.

  • Responsive Design – Works on desktop and mobile devices.

  • Educational Content – Explains the theorem with the formula.

Technologies Used:

  • HTML5 – Structure of the web application.

  • CSS3 – Styling with modern layouts, animations, and variables.

  • JavaScript – Dynamic calculations, SVG rendering, and localStorage for history.

  • SVG (Scalable Vector Graphics) – For the interactive triangle visualization.

  • Font Awesome – Icons for better UI/UX.

How to Use:

  1. Select Calculation Mode

    • Find Hypotenuse: Enter the lengths of the two legs (a and b).

    • Find Leg: Enter one leg (a or b) and the hypotenuse (c).

  2. Enter Values

    • Input numbers in the provided fields.

  3. Calculate

    • Click the "Calculate" button to see the result.

  4. View Results

    • The missing side length is displayed.

    • A visual triangle updates to match your inputs.

    • The calculation is saved in history.

Additional Features:

  • Copy the result using the copy button.

  • Reset the form to start a new calculation.

  • Clear History if needed.

Sample Screenshots of the Project

Landing Page (Finding Hypotenuse)

Finding Leg

History and Footer

How to Run?

  • Download the provided source code zip file.
  • Extract the downloaded zip file.
  • Open the html file and you are now ready to go!

Video Demonstration for Installation/Setup:

Conclusion:

In conclusion, the Pythagorean Theorem Calculator is a powerful yet user-friendly tool that brings mathematical concepts to life, offering instant calculations, dynamic visualizations, and a seamless experience for learners and professionals alike—making geometry simpler and more engaging than ever before!

That's it! I hope this "Pythagorean Theorem Calculator Using HTML, CSS and JavaScript" will assist you on your  programming journey, providing value to your current and upcoming projects.

For additional tutorials and free source codes, explore our website.

Enjoy Coding :>>

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

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