EF and MN are two chords of a circle with center O, which intersect each other at G. If ∠EGN = 40°, then what is the value of ∠EON + ∠FOM is
1
60°
2
70°
3
80°
4
90°
EF and MN are two chords of a circle with center O, which intersect each other at G. If ∠EGN = 40°, then what is the value of ∠EON + ∠FOM is