1. in triangles ghi and rst, ∠g ≅ ∠r, ∠h ≅ ∠s, and segment gi ≅ segment rt. is this information sufficient to prove triangles ghi and rst congruent through sss? explain your answer. 2. rstu is a parallelogram. if m∠tsv = 31° and m∠svt = 126°, explain how you can find the measure of ∠urv. show all steps of your work, and refer to any properties of triangles, parallelograms, or triangle congruency theorems as necessary to justify your response. quadrilateral rstu, diagonals su and rt intersect at point v. 3. graph a triangle (lmn) and rotate it 180° around the origin to create triangle l′m′n′. describe the transformation using words. make sure you refer to the characteristics and the coordinates. draw a line through points l and l′ and through m and m′. what do you notice about the lines you drew? do you think you would notice the same characteristics if you drew another line through points n and n′? how do you know? show work, you.