A) \[{{138}^{{}^\circ }}\]
B) \[{{165}^{{}^\circ }}\]
C) \[{{88}^{{}^\circ }}\]
D) None of these
Correct Answer: B
Solution :
(b): The figure in question may confuse us. But actually the figure is: \[ABCE\text{ }is\text{ }a\text{ }\parallel gm\] \[~=AB=CE\] Thus in \[{{\Delta }^{1e}}CDE,\]all sides are equal \[=\angle ECD={{60}^{{}^\circ }}\] \[=\angle BCD-\angle BCE+\angle ECD\] \[={{105}^{{}^\circ }}+{{60}^{{}^\circ }}={{165}^{{}^\circ }}.\]You need to login to perform this action.
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