Geometry - Triangles, Altitudes, and Medians

Equilateral triangles

All three sides have the exact same length

Isosceles triangles

Only two side have the same measures

Scalene triangles

Every side has a different length

Measure of all triangles

180°

Right triangles

triangles with an angle of 90°

Altitude

A perpendicular line segment from one vertex of the triangle to meet the opposite side

Orthocenter

The point where all 3 altitudes intersect

Medians

Connects the vertex to the midpoint of the opposite side

Centroid

The point where all 3 medians intersect

* The centroid cuts each median into 2 segments and the longer segment us twice as much as the shorter one

Triangle inequality

Each side must be less than the sum of the other two

* a