Obtuse Triangle – GeoGebra

Types of Triangles(By Sides and Angles) – GeoGebra

Baricentro y propiedades – GeoGebra

Tetrahedron -- Visualizing the angles

Orthocenter of acute and obtuse triangles – GeoGebra

Classifying Triangles – GeoGebra

Classify Triangles by Sides and Angles – GeoGebra

Vídeo Aula GeoGebra (Baricentro)

Altitudes in a Triangle – GeoGebra

⏩SOLVED:set up each problem and supply a proof of the statement