A) \[60{}^\circ \]
B) \[70{}^\circ \]
C) \[80{}^\circ \]
D) \[100{}^\circ \]
Correct Answer: C
Solution :
(c): In trapezium ABCD, \[AB\parallel CD\] \[x-{{20}^{{}^\circ }}+y+{{40}^{{}^\circ }}={{180}^{{}^\circ }}\] \[\Rightarrow 2x+{{20}^{{}^\circ }}={{180}^{{}^\circ }}\left( since\,x=y \right)\] \[\Rightarrow x={{80}^{{}^\circ }}\]You need to login to perform this action.
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