Alexandra holds a piece of transparency paper with a drawing on it at in front of a flashlight held at point . Her drawing is projected onto the ceiling at
. She uses the measurements shown in inches to indirectly measure the length of the drawing projected on the ceiling.

Part A
If is congruent to , how are the side lengths shown in the diagram related? Explain your reasoning.
Part B
If the length of XW , her drawing on the transparency paper, is 12 inches, what is the length of the drawing projected onto the ceiling?