Lesson 5 4 Checkpoint below 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 1 Prove that the triangles are congruent or explain why this is not possible 9m R A 6 m 9m 2 The two triangles in the figure below are congruent by SSS What is the value of x t D 6m B 5x 1 H 2x 13 C