question_answer

\[\Delta ABC\]is right angled at A .lf\[BC=\sqrt{2}\]and AB = AC =1, what is the measure of\[\angle B\]?

A)  \[\text{6}0{}^\circ \]                                     

B)  \[\text{45}{}^\circ \]

C)  \[\text{3}0{}^\circ \]                     

D)         \[\text{9}0{}^\circ \]

Correct Answer: B

Solution :

 \[\Rightarrow \] From the tables, \[\frac{L.C.M.(6,2)}{H.C.F.(14,7)}=\frac{6}{7}\]. Therefore \[\text{7}\times \text{13}+\text{13}=\text{1}0\text{4}=\text{23}\times \text{13}\]\[\therefore \]\[\text{7}\times \text{13}+\text{13}\]