1.

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^(@)`

Answer» 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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