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.[br][br]1. Translate by directed line segment [i]v[/i].[br]2. Rotate the image ____ degrees counterclockwise around point D.[br]3. Reflect that image over line DE.[br][br]Draw each image and determine the angle of rotation needed in step 2 for these steps to take ABC to DEF.

Információ: G 1.13.3 Translate, Rotate, Reflect