Medians, Midsegments, Altitudes & Centroids

Midsegments of Triangles

This is that thing where a segment is drawn across a triangle, parallel to one side while hitting the other two sides in their midpoints.

Medians, Centroids & Orthocenters

This video covers a grab bag of fun geometry terms, including the circumcenter. Most of this stuff you'll never see again, but it's kind of cool that the centroid of a triangle is also it's center of gravity, or balance point.