What class of Triangles use Pythagorean Theorem?

Topic:
Triangles
Move points A and B to change the triangle into an [b]acute[\b], [b]right[\b], or [b]obtuse[\b] triangle. Watch what happens to the relationship of a² + b² versus c². Can you determine the relationship between the Pythagorean Theorem and the type of triangle?
What type of triangle makes the green banner display?