9. A carpenter cut the top section of a window frame with a 40º 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?_____________________

How do you know?

9 A carpenter cut the top section of a window frame with a 40º angle on each end The side pieces each have a 50º angle cut at their top ends as shown Will the s class=