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					     Journal Question:
1.    49
2.    12  8  ?
                      Volume

   Rectangular Prism:
       Kleenex Box
       Cereal Box
   Formula:
   V=lwh This means length x width x
    height
                  Examples:
   Find the Volume using V=lwh
    #1.          22in.

      6in.
                       5in.

    V=lwh
    V=22x5x6
    V= 660in3
               More Practice:

#2.           20ft.            #3.     10yd.
                        3ft.
      5ft.

             V=lwh                   V=lwh
             V=20x5x3                V=10x10x10
             V=300ft3                V=1,000yd3
                      Volume
   Cylinders:
       Soup Can
       Coffee Can
   Formula:
    V=

          r h
             2


   Why πr2h?
   πr2 is the area of a circle for the floor of the
    cylinder, then we multiply it times the height
          Volume of Cylinders:
   Find the volume of the cylinders using
      V=πr2h
    #1. r = 4in. h=10in.   #2. r = 2in. h=20in.




     V= π(42)(10)      V=π(22)(20)
    V= π(16)(10)           V= π(4)(20)
    V=π(160) in3           V= π(80) in3
                More Practice:
   Find the volume. Use 3.14 for pi.
    #3.       r = 6ft. h= 30ft.



       V=   πr2h
       V=   3.14(62)(30)
       V=   3.14 x 36 x 30
       V=   3391.2 ft3
    Homework:

   Workbook pg. #

				
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posted:11/6/2011
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