4.已知角AOB=50度,角BOC=30度,则角AOC=__________,或__________.

问题描述:

4.已知角AOB=50度,角BOC=30度,则角AOC=__________,或__________.

4.已知角AOB=50度,角BOC=30度,则角AOC=___20_______,或_____80_____.

已知角AOB=50度,角BOC=30度,则角AOC=80度,或20度.