Triangle Calculator
Calculate triangle properties by entering any three values (at least one side). Supports both degree and radian angles.
Understanding Triangles
A triangle is a three-sided polygon with three vertices and three angles. The sum of all internal angles in a triangle is always 180 degrees (π radians).
Types of Triangles
- Equilateral Triangle: All sides and angles are equal (60° each)
- Isosceles Triangle: Two sides and two angles are equal
- Scalene Triangle: All sides and angles are different
- Right Triangle: Has one 90° angle
Key Triangle Properties
- Area = ½ × base × height
- Perimeter = sum of all sides
- The longest side is opposite to the largest angle
- The sum of any two sides must be greater than the third side