• Let's do the second part, which is a portion of the unit circle.

    我们来第二部分单位圆上段圆弧

    youdao

  • The balloon is a circle shape. What other shapes do you see?

    气球形状一个圆圈见过其他形状的气球吗?

    youdao

  • Do I need to draw a tangent line of this circle?

    需要画出这个切线吗?

    youdao

  • Do I need to draw a tangent line of this circle?

    需要画出这个切线吗?

    youdao

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进来说说原因吧 确定