NYS Geometry Jan 2015 Question 27
Geogebra sketch of a solution to NYS Geometry Regents January 2015, Question 27, choice 2- rotation. [Yes, a glide reflection also works but a glide reflection is the composition of two transformations.]
Line e is the perpendicular bisector of A A' and line f is the perpendicular bisector of B B'. Point E is the intersection of these two lines. AB maps to A'B' under a rotation of 90 degrees around point E (4.5, -1.5)