摘要:­14.360 ­180 ­15.19­12­2 16.7­16.18°­162°­ 17.直­钝­锐­ 18.90°­直角­180°­平角­19.46°33′­136°33′ ­20.射线­射线­角平分线­ 21.相等­ 22.∠­AMF和∠EMB­∠FMB­ 23.90° ­24.27°39′­ 25.67.5 ­26.6­∠AOC,∠AOD,∠AO­B,∠COD,∠COB,∠BOD­ 27.90°­60°­OC ­28.120°­30° ­29.60°­ 30.∠DOE­­∠AOD­∠COD和∠AOB

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