A) \[20{}^\circ \]
B) \[40{}^\circ \]
C) \[60{}^\circ \]
D) \[80{}^\circ \]
Correct Answer: C
Solution :
\[\angle ADC+\angle EDC=180{}^\circ \] \[\Rightarrow \]\[\angle ADC+120{}^\circ =180{}^\circ \] \[\Rightarrow \] \[\angle ADC=60{}^\circ \] \[\angle ABC=\angle ADC=60{}^\circ \] (\[\because \]angles in the same segment).You need to login to perform this action.
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