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  • 净额净额净额

    Planning  a Birdhouse
    ::规划鸟屋a

    The following scenario was introduced in the lesson :
    ::课程中介绍了以下情景:

    Adelene wants to build a birdhouse in the shape of a right rectangular prism with a width of 4 inches, a length of 5 ½ inches, and a height of 8 inches. She currently has a board that is 7 inches by 25 inches.
    ::阿德琳想以右侧矩形棱柱形的形式建立一个鸟屋,宽4英寸,长度5个半英寸,高度8英寸。 她目前有一个7英寸乘25英寸的板。

    Using , you can find that Adelene has enough wood to make the birdhouse. However, can she cut each side of the birdhouse from the board without having to combine pieces to make a side? 
    ::但是,她可以把鸟屋的两侧从板子上切开来,而不必把碎片合在一起来做另一边吗?

     

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    How might Adelene figure out if she can make all the cuts without having to combine pieces to make a side?
    ::阿德琳怎么会知道 如果她能做所有的切口 而不必把碎片组合成一面呢?

    Explain your idea below and/or discuss it with others.
    ::解释你以下的想法,并(或)与其他人讨论。

    Maximum 1000 characters (1000 Remaining)

     

     

    Building a Birdhouse
    ::建造鸟屋a

    One way to answer the question above is by using a .  Remember that a net is a 2-dimensional pattern that can be folded into a 3-dimensional solid.
    ::回答上述问题的方法之一是使用 。 记住, 网是一个二维的图案, 可以折叠成三维的固态 。

    Use the interactive to examine how the net of the birdhouse could look like laid on top of the board to determine how Adelene might cut the wood.
    ::利用互动来检查鸟屋的网 如何看起来像被放在板顶上 以确定阿德琳如何切开木头

     

     

    Discussion Questions
    ::讨论问题 讨论问题

    1. Will Adelene be able to cut out all six sides without the need glue pieces together to make a side?
      ::黛琳能把六面切开吗?
    2. What could she do?
      ::她能怎么办?

     

    Surface Area of Cubes
    ::立方体表面面积

    In the interactive below, you will explore the surface area of cubes and how it relates to the length of the cube’s side length.
    ::在下文互动中,您将探索立方体的表面区域,以及它与立方体侧长的长度有何关系。

     

     

     

     

      

    Finding Surface Area From a Net
    ::从净额中查找表面面积

    For this interactive, you will calculate the surface area of polyhedra by opening up the net and finding the areas of each of the faces.
    ::为此互动,您将打开网并找到每个面孔的面积,以此计算聚赫德拉的表面面积。

     

     

    Discussion Question
    ::讨论问题

    What strategies did you use to find the surface area using a net?
    ::你用什么策略来用网寻找地面区域?

     

     Summary
    ::摘要

    • Nets can help you visualize and calculate the surface area of solids.
      ::网络可以帮助您视觉化和计算固体的表面面积。
    • Given the net of a solid,  add the areas of each face to find the surface area.
      ::根据固体的网,加上每张脸的面积以找到表面面积。
    • The surface area of a cube with side length s  can be found using the formula  S A = 6 s 2 .  
      ::用SA=6s2公式可以找到侧长的立方体表面区域。