Click on the links below to learn more about classifying triangles by their angles and by their sides and how to calculate a missing third angle:

 Triangles Classified by Their Sides:

Link #1-AAAMath (interactive with score results)

Triangles Classified by Their Angles:

Link #1-AAAMath (interactive with score results)

Link #2-Math-Play Game

 Both:

Link #1-Brainpop-Video

Link #2-FactMonster-Game