Equilateral Triangle Calculator
What is a Triangle?
A triangle is a three-sided polygon and one of the most basic shapes in geometry. The sum of its interior angles is always 180 degrees.
Our Triangle Calculator helps you quickly calculate area, perimeter, and side lengths with accurate results.
How to Use the Triangle Calculator
Using our area of triangle calculator is simple:
Enter the required values (base and height or side lengths)
Click calculate
Instantly view the results
The calculator works smoothly on desktop and mobile devices.
Triangle Area Formula
The most common formula for area is:
Area = (Base × Height) ÷ 2
Example:
If base = 10 and height = 6
Area = (10 × 6) ÷ 2 = 30
You can easily calculate this using our triangle area calculator.
Triangle Perimeter Formula
To find the perimeter:
Perimeter = Side1 + Side2 + Side3
Example:
If sides are 5, 6, and 7
Perimeter = 5 + 6 + 7 = 18
Our triangle perimeter calculator provides instant and accurate answers.
Types of Triangles
✔ Equilateral Triangle (all sides equal)
✔ Isosceles Triangle (two sides equal)
✔ Scalene Triangle (all sides different)
✔ Right Triangle (one 90° angle)
This geometry calculator supports various triangle calculations.
🔹 Why Use an Online Triangle Calculator?
✔ Saves time
✔ Avoids manual errors
✔ Useful for students and teachers
✔ Helpful for engineering and construction tasks
✔ Fast and free to use
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Frequently Asked Questions (FAQs)
Q1: Is this triangle calculator free?
Yes, it is completely free.
Q2: Can I calculate both area and perimeter?
Yes, the tool provides both calculations.
Q3: Is it accurate?
Yes, it uses correct geometry formulas.
Q4: Does it work on mobile devices?
Yes, it works on all devices.