question_answer

Look at the following figure if \[\mathbf{b}=\mathbf{7}{{\mathbf{0}}^{{}^\circ }},\text{ }\mathbf{c}=\mathbf{11}{{\mathbf{0}}^{{}^\circ }},\mathbf{d}=\mathbf{7}{{\mathbf{0}}^{{}^\circ }}\]then find the value of a.

A) \[{{125}^{{}^\circ }}\]                       

B) \[{{135}^{{}^\circ }}\]         

C) \[{{155}^{{}^\circ }}\]                       

D) \[{{110}^{{}^\circ }}\]

E) None of these