填空题:(1)平角的1/2是( )角,周角的5/6是( )度.(2)一个圆环,内圆直径是6想cm,环宽1cm,那么环形的面积是()平方厘米.判断题:(1)只有一组对边平行的四边行是梯形.()(2)角的两边
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![填空题:(1)平角的1/2是( )角,周角的5/6是( )度.(2)一个圆环,内圆直径是6想cm,环宽1cm,那么环形的面积是()平方厘米.判断题:(1)只有一组对边平行的四边行是梯形.()(2)角的两边](/uploads/image/z/10404508-4-8.jpg?t=%E5%A1%AB%E7%A9%BA%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%89%E5%B9%B3%E8%A7%92%E7%9A%841%2F2%E6%98%AF%28+%29%E8%A7%92%2C%E5%91%A8%E8%A7%92%E7%9A%845%2F6%E6%98%AF%28+%29%E5%BA%A6.%EF%BC%882%EF%BC%89%E4%B8%80%E4%B8%AA%E5%9C%86%E7%8E%AF%2C%E5%86%85%E5%9C%86%E7%9B%B4%E5%BE%84%E6%98%AF6%E6%83%B3cm%2C%E7%8E%AF%E5%AE%BD1cm%2C%E9%82%A3%E4%B9%88%E7%8E%AF%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%98%AF%EF%BC%88%EF%BC%89%E5%B9%B3%E6%96%B9%E5%8E%98%E7%B1%B3.%E5%88%A4%E6%96%AD%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%89%E5%8F%AA%E6%9C%89%E4%B8%80%E7%BB%84%E5%AF%B9%E8%BE%B9%E5%B9%B3%E8%A1%8C%E7%9A%84%E5%9B%9B%E8%BE%B9%E8%A1%8C%E6%98%AF%E6%A2%AF%E5%BD%A2.%EF%BC%88%EF%BC%89%EF%BC%882%EF%BC%89%E8%A7%92%E7%9A%84%E4%B8%A4%E8%BE%B9)
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