Types of Triangles
Drag each red dot ("vertex" or corner) to change the triangles. You will notice that they change in different ways. Be sure to drag every vertex!
As you are dragging, fill out this chart.
Triangle 
What do you notice about the lengths of the sides? 
What do you notice about the angles? 
Red   
Blue   
Green   
Purple   
You can move the blue and purple triangles so that their vertices match up and the two triangles lie on top of each other (try it!). This is marked on the chart below by the Y. Mark Y or N in each box of the chart to show whether the other pairs can match up.
 Red  Blue  Green  Purple 
Purple   Y   
Green     
Blue     
 Which triangle is your favorite? Why?
