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so I think I got nine correct but 10-11 are part of the same problem and I'm not sure to go from here

so I think I got nine correct but 10-11 are part of the same problem and I'm not sure-example-1

1 Answer

5 votes

\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}
\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}

User Bharti Ladumor
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