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- Altitude of a triangle
This online calculator computes the length of a altitude of a triangle, given the lengths of edges of a triangle.

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

- Area of triangle by coordinates
This calculator determines area of triangle, using its vertex coordinates in cartesian coordinate system

- Calculator of area of a triangle using Hero's formula
- Circumcircle of a triangle
This online calculator determines the radius and area of the circumcircle of a triangle given the three sides

- Incircle of a triangle
This online calculator determines the radius and area of the incircle of a triangle given the three sides

- Lengths of triangle sides given one side and two angles
This online calculator determines lengths of triangle sides given one side and two angles

- Median of a triangle
This online calculator computes median of a triange given triangle sides

- Polygon area
Online calculator which calculates area of a polygon given lengths of polygon sides and diagonals which split polygon to nonoverlapping triangles

- Side length of a right triangle
Calculates the side length of a right triangle from two other sides using Pythagorean theorem. Created by user's request

- Side length of a triangle
This calculator computes side length of a triangle given two sides and angle between them (law of cosines)

- Triangle angles for given triangle sides
This calculator computes triangle angles for given triangle sides using cosine law