Please solve question no 5 with proper explanation 

Asked by adityaahuja099 | 26th Nov, 2017, 03:41: PM

Expert Answer:

begin mathsize 16px style angle CED plus angle CBD equals 180 degree..... cyclic space quadrilateral
angle CFD plus angle CAD equals 180 degree..... cyclic space quadrilateral
Adding space both
angle CED plus angle CBD plus angle CFD plus angle CAD equals 360 degree
2 angle CED equals angle CAD..... angle space subtended space by space arc space at space center space and space on space circle space
2 angle CFD equals angle CBD..... angle space subtended space by space arc space at space center space and space on space circle
angle CED plus 2 angle CFD plus angle CFD plus 2 angle CED equals 360 degree
angle CED plus angle CFD equals 360 degree cross times 1 third equals 120 degree end style

Answered by Arun | 26th Nov, 2017, 08:34: PM