Answer
m$\angle$1=50 degrees
m$\angle$2=40 degrees
m$\angle$3=90 degrees
m$\angle$4=40 degrees
Work Step by Step
m$\angle$4=180-90-50
m$\angle$4=40 degrees
m$\angle$1=50 degrees (vertical angles)
m$\angle$2=m$\angle$4=40 degrees (vertical angles)
m$\angle$3=90 degrees (vertical angles)
