Question

点o在直线ab上,射线oc,od在af的上方,角aoc＞角aod,oe平分角aod. 1.如图,射

Answer 1

∵OE平分∠AOD

∴∠EOD=1/2∠AOD

又∵∠EOF=1/2∠AOC

∴∠EOF=∠EOD+∠DOF=1/2∠AOC=1/2（∠AOD+∠DOC)=1/2∠AOD+1/2∠DOC

∴∠OF是∠COD的平分线