New Shortcut for Proving Triangles are Congruent

You must keep the side AB with a length of 6 and angle A=60 degrees and angle B=40 degrees.

Use the sliders to extend the other two side lengths of your triangle. Keep adjusting the side lengths until they connect at the same point. 1. What is the length of your side1? 2. What is the length of your side2? 3. Will someone else be able to make a triangle with different side lengths? 4. What are the initials of this new shortcut?