Which of the following does NOT preserve rigid motion?
A. Translation left 8, then dilated by a scale factor of 4
B. Reflection over the x-axis, then rotated 90° CCW
C. Rotation of 120° CW, then translated left 1 & right 2
D. Reflection over line y = x, then translated up 5

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π