Your teacher will grade your responses to questions 4–8 to ensure you receive proper credit for your answers.

A carpenter cut the top section of a window frame with a 37º angle on each end. The side pieces each have a 50º angle cut at their top ends, as shown. Will the side pieces of the frame be parallel? Explain. Diagram not to scale

since 50+37 < 90, the sides will not be parallel.