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October 30th, 2012, 05:05 AM   #1
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area of the green section

eight squares (side length 1) put together, please find the area of the green section
[attachment=0:gsh3zdan]area of green section .jpg[/attachment:gsh3zdan]
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File Type: jpg area of green section .jpg (12.4 KB, 115 views)
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October 30th, 2012, 07:17 AM   #2
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Re: area of the green section

Hello, Albert.Teng!

Quote:
Eight squares (side length 1) put together.
Find the area of the shaded region.
Answer:
Code:
              * * *
        A * - - - - - * B
        *:::::::::::::::*
     C *- - - - - - - - -* D

      *                   *
    E *---------*---------* F
      : - -2- - O - -2- - :

Draw
Note that they all have length 2.



















[color=beige]. . . . . . . . . . . [/color]

[color=beige]. . . . . . . . . . . [/color]


I see that LaTeX is still misspelling my words.
So I have to take heroic measures to overcome it.

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October 30th, 2012, 09:47 AM   #3
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What difficulty occurred with LaTeX? It seemed to work for me.
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October 30th, 2012, 08:04 PM   #4
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Re: area of the green section

the area of the green section is the same as the area of a sector with radius 2 and central angle :

so the area is :
[attachment=0:ke4xayyo]area of green section~.jpg[/attachment:ke4xayyo]
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File Type: jpg area of green section~.jpg (21.5 KB, 69 views)
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