G 1.13.3 Translate, Rotate, Reflect
Mai suspects triangle ABC is congruent to triangle DEF. She thinks these steps will work to show there is a rigid transformation from ABC to DEF.
1. Translate by directed line segment v.
2. Rotate the image ____ degrees counterclockwise around point D.
3. Reflect that image over line DE.
Draw each image and determine the angle of rotation needed in step 2 for these steps to take ABC to DEF.