ergei wants to prove that Triangle A B C is similar to Triangle F G H. On a coordinate plane, triangle A B C has points (1, 1), (3, 3), (3, 1). Triangle F G H has points (4, 4), (12, 12), (12, 4). Which would help him prove that? Check all that apply. Measure angles A and F to show they are congruent. Measure angles F and G to show they are congruent. Use the right angle marks to show that angles C and H are congruent. Use the grid or a ruler to show that A B = F G, B C = F G, and A C = F H. Use the grid or a ruler to show that StartFraction F G Over A B EndFraction = StartFraction G H Over B C EndFraction = StartFraction F H Over A C EndFraction.