180°-30°15'-70°30'=

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/01 06:25:09

180°-30°15'-70°30'=

180°-30°15'-70°30'
=179°60'-30°15'-70°30'
=149°45'-70°30'
=79°15

180°-30°15'-70°30'
=180º-100º45′
=79º15′

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