Triangle Calculator
Calculate triangle properties quickly and accurately. Enter any three values to solve the triangle.
Input Values
Results
Triangle Visualization
How to Use This Calculator
- Enter any three values of the triangle (sides or angles)
- Click “Calculate” to solve for all unknown values
- Use “Reset” to clear all inputs and results
- The calculator uses the Law of Sines and Law of Cosines to solve triangles
- All angles are in degrees, sides in the same unit
Free Online Triangle Calculator Tool
The Triangle Calculator Tool helps you calculate important triangle properties like area, perimeter, angles, and side lengths. Whether you’re a student solving geometry problems, a teacher preparing lessons, or an engineer working on designs, this free tool provides instant and accurate results.
What is a Triangle Calculator?
A triangle calculator is an online geometry tool that helps you solve different measurements of a triangle such as area, perimeter, angles, and sides. By inputting basic values like base and height, or side lengths, you can instantly calculate other properties of the triangle.
How to Use the Triangle Calculator
- Enter the values of the sides, base, or height of the triangle.
- Select the formula you want to use (area, perimeter, angles, etc.).
- Click the Calculate button.
- Get instant results with step-by-step values.
Why Use Our Free Triangle Calculator?
- ✅ Completely Free – unlimited calculations without signup.
- ✅ Accurate Results – powered by geometric formulas.
- ✅ Easy-to-Use – clean interface for students and professionals.
- ✅ Educational Tool – perfect for learning geometry concepts.
- ✅ Mobile-Friendly – works on phones, tablets, and desktops.
Formulas Used in Triangle Calculator
- Area: ½ × Base × Height
- Perimeter: Sum of all three sides
- Heron’s Formula: √s(s-a)(s-b)(s-c), where s = semi-perimeter
- Trigonometric Relations: sin, cos, and tan rules for angles
Common Use Cases
- ✔️ Students solving geometry homework and exams.
- ✔️ Teachers preparing lessons and exercises.
- ✔️ Engineers and architects designing structures.
- ✔️ Anyone who needs quick triangle calculations.
Frequently Asked Questions
1. Is the Triangle Calculator free?
Yes, the tool is 100% free with no hidden charges.
2. Can I calculate all types of triangles?
Yes, you can calculate for scalene, isosceles, equilateral, and right triangles.
3. Does the tool show formulas?
Yes, the tool uses standard geometry formulas and displays them clearly.
4. Can I use it on my phone?
Yes, it is mobile-friendly and works on any device with a browser.
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Conclusion
The Free Online Triangle Calculator Tool is a quick and reliable solution for calculating triangle properties like area, perimeter, and angles. It’s designed for students, teachers, engineers, and anyone interested in geometry. Try it now and solve triangle problems instantly!