SSS and SAS

Are either of the other triangles similar to BCD. If so name it and prove the similarity.

 Verify that △ABC∼△DEF. Find the scale factor of △ABC to △DEF. △ABC: BC = 18, AB = 15, AC = 12 △DEF: EF = 12, DE = 10, DF = 8

Are there similar triangles in the diagram? If so, identify them.

Prove whether or not ABC is similar to AED. If they are, what is the scale factor and what is the measure of CB?

(Note: measurements are approximations and all calculations can be rounded to the nearest whole number) You're the manager of a movie theater and one of the projectors rooms just got an overhaul, complete with a new projector. the screen dimensions are about 60 feet wide and 32.5 feet tall. The window for the projection is about 2.5 feet wide and 16 inches tall. The layout looks roughly like the diagram above (not to scale). Are the screen and window roughly to scale? If so, what is the approximate scale factor? If the screen is 92 feet from the window, how far from the window should the projector be to fit the scale/diagram?