Triangles are the foundation of geometry. Whether you need to calculate the area of a roof, find the height of a tree, or solve a geometry problem, our triangle calculator has you covered.
Triangle Types
| Type | Properties |
|---|---|
| Equilateral | All sides equal, all angles 60ยฐ |
| Isosceles | Two equal sides, two equal angles |
| Scalene | No equal sides or angles |
| Right | One 90ยฐ angle |
| Acute | All angles less than 90ยฐ |
| Obtuse | One angle greater than 90ยฐ |
The Pythagorean Theorem
aยฒ + bยฒ = cยฒ
For any right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides.
Example: Right Triangle
If a=3 and b=4:
- cยฒ = 3ยฒ + 4ยฒ = 9 + 16 = 25
- c = โ25 = 5
- Area = (3 ร 4) รท 2 = 6
Triangle Area Formula
Area = ยฝ ร base ร height
For triangles where height isn't known, use Heron's formula:
Area = โ(s(s-a)(s-b)(s-c)) where s = (a+b+c)/2
Using Our Triangle Calculator
Our Triangle Calculator computes:
- Area, perimeter, and semi-perimeter
- All angles from side lengths
- Works with any triangle type
๐ก Pro Tip: You only need to know three pieces of information (like two sides and one angle) to solve for everything else. Our calculator does the rest!
*Solve triangles with our free Triangle Calculator.*
