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1. If one angle of a cyclic quadrilateral is \(75^\circ\), then the opposite angle is:
2. ![YCIND20220816_4255_Geometry_71.png](https://resources.cdn.yaclass.in/fd33ad00-f609-4e1b-880e-ae767b842647/YCIND202208164255Geometry71w219.png)
![YCIND20220816_4255_Geometry_71.png](https://resources.cdn.yaclass.in/fd33ad00-f609-4e1b-880e-ae767b842647/YCIND202208164255Geometry71w219.png)
In the figure, \(ABCD\) is a cyclic quadrilateral in which \(DC\) produced to \(E\) and \(CF\) is drawn parallel to \(AB\) such that \(\angle ADC = 80^\circ\) and \(\angle ECF = 20^\circ\), then \(\angle BAD =\) ?