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A contractor was hired to build an outdoor playpen for a small family dog. The playpen should be square and should have a total area of 200 square feet. How long should the individual sides of the playpen be? (Recall that the area of a square is calculated by 2003-04-02-00-00_files/i0150000.jpg, where l is the length of one side.)

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merlynthewhizz
Area of a square = side × side

A square has four equal sides, so we can write the area of a square as
[tex]A=s[/tex]×[tex]s[/tex]
[tex]A= s^{2} [/tex]
[tex]200= s^{2} [/tex]
[tex]s= \sqrt{200}=10 \sqrt{2}=14.14 [/tex] rounded to 2 dp

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