📤 DOWNLOAD THE TOOL

📐 Right‑Angle Triangle Field Calculator

A practical offline field tool for surveyors and engineers to quickly compute the third side of a right‑angled triangle.
Ideal for marking right angles in the field using methods like 3‑4‑5 triangle or for custom dimensions.

✨ Features

🧮 Triangle Computation

  • Enter any two sides → the tool computes the third side automatically.
  • Calculates all triangle properties:
  • Base (a)
  • Height (b)
  • Hypotenuse (c)
  • ∠ at base (θ), ∠ at height (φ), Right angle (90°).
  • Uses Pythagoras theorem in real time.

🎨 Interactive Visualization

  • Live triangle sketch updates with each input.
  • Computed side highlighted in sky‑blue glow.
  • Displays side lengths and angles directly on sketch.
  • Draws right‑angle marker at corner.

🖥️ UI & Usability

  • 🌗 Dark/Light theme toggle (remembers preference).
  • 🚦 Error detection for invalid inputs (e.g., hypotenuse shorter than legs).
  • Input highlighting:
  • Recently entered values = green highlight.
  • Auto‑computed side = blue highlight.
  • Animated “⚡ sparks” effect on computed side for visibility.

📑 Formula & Explanation

  • Shows formula, substitution, calculation, and result for transparency.
  • Example:
  Formula: c² = a² + b²
  Substitution: c² = 6² + 8²
  Calculation: √(36 + 64)
  Result: c = 10

🖼️ Preview

Screenshot 2025-08-26 115136

🚀 How to Use

  1. Open Triangle Sides Calculator.html in your browser.
  2. Enter any two dimensions (Base, Height, or Hypotenuse).
  3. The third side and internal angles are computed instantly.
  4. Review the live triangle sketch + step‑by‑step formula.

📄 Example Use Case

  • Field marking of right angles:
  • Input Base = 9, Height = 12.
  • Tool computes Hypotenuse = 15.
  • Angles displayed: θ ≈ 53.13°, φ ≈ 36.87°.

⚡ Why Use This Tool?

  • 🧑‍💼 Saves time in the field — no manual calculator needed.
  • 📐 Perfect for setting out right angles in construction and surveying.
  • 💻 Runs fully offline in any browser (desktop or mobile).
  • 🎯 Provides visual + formula verification for confidence.

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