## Calculate Area of Scalene Triangles

The triangle is one of the basic geometric shapes in geometry. It has 3 sides with 3 vertices (corners). The Scalene triangles is but one category of triangles which have 3 unequal sides and 3 unequal angles.

Here, we have two methods of working out the area of a Scalene Triangle, one formula is based on knowing all the side lengths and the other is by knowing 2 sides and the inbetween angle...

The formula for this (scalene) and any other types of triangle can be found with **Heron's formula** (Hero's formula).

**s = ½(a + b + c)**

**Area = √(s(s-a)(s-b)(s-c))**

or...

**Area = ½a x b x Sin(C)**

Side a | |

Angle C° | |

Side b | |

Side c | |

Area | |

Perimeter |

*All sides and lengths are in

*units*(e.g. metres), and area will be in

*unit squares*(e.g. metres

^{2}). Angles are in

*degrees*(θ°)