hannahbug021404
hannahbug021404 hannahbug021404
  • 29-03-2016
  • Mathematics
contestada

A paper air plane looking polygon with sides of 5 5 and 8 what is the area

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slevo
slevo slevo
  • 29-03-2016
If it has 3 sides then it's a triangle. 
Using the formula [tex]A= \sqrt{s(s-a)(s-b)(s-c)} [/tex] 
where [tex]s= \frac{a+b+c}{2} [/tex]
and  a=5 b=5 c=8

∴[tex] s= \frac{5+5+8}{2} =9[/tex]
  [tex]area= \sqrt{9(9-5)(9-5)(9-8)} [/tex]
  [tex]area= \sqrt{144} = 12units^{2} [/tex]
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