∠EOD=180-∠AOE-∠DOB=180-15-35=130
∠EOD=∠COF=130
∵OG平分∠COF
∴∠COG=1/2∠COF=65
∠DOB=∠AOC=35
∠EOG=∠AOE+∠COA+∠GOC=15+35+65=115