Triangle Calculator
Calculate area and perimeter of triangles.
Calculated properties
Perimeter
12
Area (Heron)
6
Angle A (Β°)
36.8698976458
Angle B (Β°)
53.1301023542
Angle C (Β°)
90
Assumption / method: The three-side (SSS) triangle area uses the numerically stable Heron product.
Calculations require finite real numbers and division by zero is undefined. Decimal arithmetic follows browser IEEE-754 floating-point rounding.