Geometry Angles and their measures

[marquita0283]

Is there an easier way to solve problem D10 on page 21 of the 12th Edition GMAT Review Guide other than the way provided in the book.

[Ben Ku]

Sorry, the OG is a banned source; it's illegal to post or discuss these problems on our forums. If you are in our classes, you should ask your instructor before or after class, or use your office hours.