[tex]\begin{gathered} 10.\text{ }(\angle1+\angle3)+90^{\circ}+17^{\circ}=180^{\circ} \\ \Rightarrow(61^{\circ}+\angle3)=180^{\circ}-90^{\circ}-17^{\circ} \\ \Rightarrow\angle3=73^{\circ}-61^{\circ} \\ \Rightarrow\angle3=12^{\circ} \end{gathered}[/tex][tex]\begin{gathered} 11. \\ \Rightarrow\angle2+\angle3+17^{\circ}=180^{\circ} \\ \Rightarrow\angle2+12^{\circ}+17^{\circ}=180^{\circ} \\ \Rightarrow\angle2=180^{\circ}-29^{\circ} \\ \Rightarrow\angle2=151^{\circ} \end{gathered}[/tex]
