Mathematics

cylinder

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  • 1. Multiple-choice
    20 seconds
    1 pt

    what word is 圆柱?

    cylinder

    circle

    diameter

    cone

  • 2. Multiple-choice
    20 seconds
    1 pt

    when radius is halved, how does the circumference of circle change?

    does not change

    12\frac{1}{2}  

    14\frac{1}{4}  

    2

  • 3. Multiple-choice
    20 seconds
    1 pt

    when radius is halved, how does the area of circle change?

    does not change

    12\frac{1}{2}  

    14\frac{1}{4}  

    2

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