A) \[72{}^\circ \]
B) \[84{}^\circ \]
C) \[18{}^\circ \]
D) \[36{}^\circ \]
Correct Answer: A
Solution :
For the \[\Delta BDC\]and \[\Delta BEC\] \[BD=EC,\]\[BC=BC\]and \[\angle BEC=\angle BDC=90{}^\circ \] Thus, \[\Delta BEC\cong \Delta BDC\] \[\therefore \]\[\angle B=\angle C=\frac{180{}^\circ -36{}^\circ }{2}=72{}^\circ \]eachYou need to login to perform this action.
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