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In the above figure, `/_ ABD =20^(@), /_ BDC =110^(@)` and `/_ DCA =30^(@)` . What is the value of `/_ BAC` ?

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In the above figure, `/_ ABD =20^(@), /_ BDC =110^(@)` and `/_ DCA =30^(@)` . What is the value of `/_ BAC` ?
A. `30^(@)`
B. `60^(@)`
C. `90^(@)`
D. `120^(@)`
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Correct Answer - b
(i) Sume of the angles in a quadrilateral is `360^(@)`.
(ii) Reflex `/_BDC =360^(@) -/_ BDC`.
(iii) `/_ BAC= 360^(@) - ( /_ ABD +` Reflex `/_BDC + /_ DCA )`.
(iv) Then find the required angle.
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