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Heron's formula calculator This calculator calculates the area of a triangle using Heron's formula. This formula gives the area of a triangle from the lengths of all three sides. The formula can be found below the calculator. |

Median of a triangle This online calculator computes the median of a triangle given triangle sides |

Angle bisector of a triangle This online calculator computes the length of angle bisector given the lengths of triangle edges |

Altitude of a triangle This online calculator computes the altitude length of a triangle, given the lengths of sides of a triangle. |

Area of triangle by coordinates This calculator determines the area of a triangle using its vertex coordinates in the cartesian coordinate system. |

Triangle Angle Calculator The Triangle Angle Calculator is a tool that calculates the angles of a triangle given the length of its sides. |

Pythagorean theorem calculator Our Pythagorean Theorem Calculator can be used to find the missing side length of a right triangle by inputting the lengths of two known sides. |

Triangle Side Length Calculator using Law of Cosines The calculator calculates the length of the third side of a triangle using the law of cosines, given the length of two sides and the angle between them. |

Sine Law Calculator This online calculator determines the lengths of triangle sides given one side and two angles using the law of sines. |

Circumcircle of a triangle This online calculator determines the radius and area of the circumcircle of a triangle given the three sides |

Triangle Incircle Calculator: Radius, Area, and Ratio The Triangle Incircle Calculator is a tool that allows you to determine the properties of the incircle of a triangle based on its side lengths. By entering the lengths of the three sides, this calculator calculates the radius and area of the incircle, which is the largest circle that can fit inside the triangle. |

Polygon area An online calculator calculates a polygon area, given lengths of polygon sides and diagonals, which split polygon to non-overlapping triangles. |

The area of a convex polygon from the coordinates of the vertices on the plane This online calculator calculates the area of a convex polygon from the coordinates of the vertices. A convex polygon is built from the vertices using the Jarvis March Algorithm (or Gift Wrapping Algorithm) |

Triangle Area Calculator This calculator is designed to find the area of a triangle using different formulas, depending on the available information about the triangle. |

Equilateral triangle This online calculator calculates characteristics of the equilateral triangle: the length of the sides, the area, the perimeter, the radius of the circumscribed circle, the radius of the inscribed circle, the altitude (height) from single known value |

Center of mass of a triangle This online calculator finds the centroid, or barycenter (center of gravity) of a triangle by the coordinates of its vertices |

Triangle values by coordinates of vertices This online calculator calculates a set of triangle values: length of sides, angles, perimeter, and area by coordinates of its vertices |