2025年教学资料:4.1.1任意角(分层作业)(解析版)
4.1.1任意角分层作业1.下列各角:-60°,126°,-63°,0°,99°,其中正角的个数是( B )A.1 B.2 C.3 D.4[解析] 正角有126°,99°共2个.2.每周一的早晨,我们都会在学校的操场上举行升国旗仪式,一般需要10分钟.这10分钟的时间,钟表的分针走过的角度是( )A.B.C.D.【答案】D【分析】计算分针走过的角度大小的同时考虑他的方向即可求解.【详解】分针是顺时针走的,形成的角度是负角,又分针走过了10分钟,走过的角度大小为,综上,分针走过的角度是.故选:D.3.下列说法中正确的是( )A.锐角是第一象限角B.终边相等的角必相等C.小...
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