1. Click and drag the vertices of the triangle to create different angles for angle A and angle B.[br][br]2. Fill in the angles for each in the table below and find the sum of the angles. [br][br]3. Then in the last column, record what the exterior angle measure is from the screen.[br][br]4. What do you observe about the sum of the two interior angles and the exterior angle?[list=1][br][/list][br][br]