[b]How to Use Virtual Manipulatives:[br][/b][br]1. To modify the triangle in the Exploration View, drag the vertices.[br][br]2. Provided in the toolbox are color-coded virtual angle manipulatives.[br][br] 2a. To use an angle manipulative, select its vertex and drag it onto the exploration view.[br] 2b. To rotate the angle manipulative, select and drag the diamond point at the end of the ray.[br][br]Note: You are provided with six manipulatives (two of each angle). You may use some or all of the manipulatives to prove the Triangle Angle Sum Theorem.