Overview of the particular lines of the triangle – GeoGebra

Special lines in Triangles – GeoGebra

Segments & Lines in Triangles – GeoGebra

Incircle of a triangle – GeoGebra

My Unique Triangle – GeoGebra

Triangle Centers – GeoGebra

G.2.4.2 What Information Do I Need? – GeoGebra

Activity 12E: Choosing the Base and Height of Triangle – GeoGebra

distance between two particular points in a triangle – GeoGebra

Equilateral Triangle – GeoGebra

The Orthocenter – GeoGebra

Triangles: Definition and Elements – GeoGebra

Geogebra Basics - Triangles

Was fooling around with Geogebra and found this. I didn't see

From Triangle to Surprise Conic!