七年级SP数学水平测试二
人气：357 ℃ 时间：2020-04-01 17:51:33
解答
(1)∵∠AOC=80°,∠BOC=20°.∴∠AOB=80°＋20°=100°.又∵OM是∠AOB的平分线.∴∠AOM=100°÷2=50°.又∵ON是∠AOC的平分线,∠AOC
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