Sitemap > Geometry > Triangles Calculating the area of triangles Calculating the surface area of a triangle can be done using multiple methods; it all depends on the information you have available at first, thus, the module below lets you calculate this using the information at your disposal. Three different methods: Area of the triangle with the three sides (by the triangulation method) Area of the triangle with the base and the height Area of the triangle with two sides and their angle 1. area of a triangle by the triangulation method (with the length of the three sides) Calculate the area and perimeter of the triangle by the triangulation method Length of the side a: Length of the side b: Length of the side c: Units: inch foot yard mile millimeter centimeter decimeter meter décameter hectometer kilometer Decimal places: 0 1 2 3 4 5 6 7 8 9 10 Results Surface of the triangle: 0,43 m^{2} Perimeter of the triangle: 3,00 m Perimeter / Area Ratio: 6,93 m par m^{2} 2. area of the triangle with the base and the height Triangle with the base and the height Length of the base B: Height H: Units: inch foot yard mile millimeter centimeter decimeter meter décameter hectometer kilometer Decimal places: 0 1 2 3 4 5 6 7 8 9 10 Results Surface of the triangle: 0,50 m^{2} 3. Calculating the area with two sides and their angle Triangle with two sides and their angle Length of the side A: Length of the side B: Units: inch foot yard mile millimeter centimeter decimeter meter décameter hectometer kilometer Angle between these 2 sides: Degrees Radians Gradians Decimal places: 0 1 2 3 4 5 6 7 8 9 10 Results Surface of the triangle: 0,35 m^{2} List of calculation pages Construction Sizing stairs Calculate a slope, a gradient, a tilt Geometry The Cylinder The Triangle The slope, gradient, tilt The Parallelogram The Quadrilateral The Evolute Helix Maths Rule of three