A) \[\sqrt{3{{a}^{2}}}\]sq cm
B) \[3\sqrt{3}{{a}^{2}}\]sq cm
C) \[\frac{{{a}^{2}}}{3}\]sq cm
D) \[2\sqrt{a}\]sq cm
Correct Answer: B
Solution :
\[\sin 30{}^\circ \,=\,\frac{1}{2}\,=\,\frac{OD}{2a}\] \[OD=\frac{2a}{2}\,=\,a\] \[\frac{1}{3}(AD)=OD\]You need to login to perform this action.
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