# 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.

- 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

**Three different methods:**

## 1. area of a triangle by the triangulation method (with the length of the three sides)

Length of the side

**a**:Length of the side

**b**:Length of the side

**c**:Units:

Decimal places:

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

Length of the base

**B**:Height

**H**:Units:

Decimal places:

Results | |
---|---|

Surface of the triangle: |
0,50 m^{2} |

## 3. Calculating the area with two sides and their angle

Length of the side

**A**:Length of the side

**B**:Units:

**Angle**between these 2 sides:

Decimal places:

Results | |
---|---|

Surface of the triangle: |
0,35 m^{2} |