Answer
m$\angle$1=8$^{\circ}$
Work Step by Step
DC=360-DA-AB-CB
DC=360-114-92-138
DC=16$^{\circ}$
m$\angle$1=.5DC
m$\angle$1=.5(16)=8$^{\circ}$
Someone from the community is currently working feverishly to complete this textbook answer. Don’t worry, it shouldn’t be long.