Answer
m$\angle$4=112$^{\circ}$
Work Step by Step
If m$\angle$3=68$^{\circ}$
then m$\angle$2=m$\angle$3=68$^{\circ}$
Now,
m$\angle$4+(m$\angle$2$\div$2)+(m$\angle$3$\div$2)=180$^{\circ}$
m$\angle$4+(68$^{\circ}$$\div$2)+(68$^{\circ}$$\div$2)=180$^{\circ}$
m$\angle$4+34$^{\circ}$+34$^{\circ}$=180$^{\circ}$
m$\angle$4=180$^{\circ}$-68$^{\circ}$
m$\angle$4=112$^{\circ}$
