1.

In the figure, \[\mathbf{AB}\parallel \mathbf{CD}.\]If \[\angle \mathbf{EAB}=\mathbf{4}{{\mathbf{5}}^{{}^\circ }}\]and \[\angle \mathbf{ECD}=\mathbf{5}{{\mathbf{5}}^{{}^\circ }}\], then \[\angle \mathbf{AEB}=\]?

A.  \[{{50}^{{}^\circ }}\]                                   
B.  \[{{60}^{{}^\circ }}\]
C.  \[{{80}^{{}^\circ }}\]     
D.  \[{{55}^{{}^\circ }}\]
Answer» D.  \[{{55}^{{}^\circ }}\]


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