Lesson 2.1 Checkpoint Once you have completed the above problems and checked your solutions, complete the Lesson Checkpoint Complete the Lesson Reflection above by circling your current understanding of the Learning Goal. below. 1. Draw the preimage and image of the triangle under a translation along (-1,3). Make sure to label appropriately. Triangle: P(1,-3); Q(3,-1); R(4,-3); ty 2 -2 0 2 2 4 x 2. Are all translations considered a rigid motion? Explain why or why not by explaining its effects on a figure's angles and line segments. Forgot what rigid motion is? Look at your Credit 1 notes.