Answer :
An angle formed by 2 chords ( angle DGF) = 1/2(the sum of the two outside angles).
DGF = 1/2 ( 81 + 59)
DGF = 1/2(140)
DGF = 70 degrees.
The answer is C.
DGF = 1/2 ( 81 + 59)
DGF = 1/2(140)
DGF = 70 degrees.
The answer is C.