King
  • King
:Help!!!!!!!.....A isosceles triangle is of height=6 cm ,perimeter=36 cm.Find its area.Please give answer with explanation @Mathematics
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
well isosceles triangles have two sides that are equal so the 2 sides are 6
King
  • King
how?
anonymous
  • anonymous
|dw:1320065137428:dw|

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King
  • King
i said height=6 |dw:1320065197358:dw|
King
  • King
@mightysmurf: ure diagram is wrong
anonymous
  • anonymous
yea i messed up sorry
King
  • King
its ok
anonymous
  • anonymous
Ok see let the equal sides each be x and base be b 2*x + b=36 and x^2 =(b/2)^2 + 6^2 (Pythagoras theorem) from the first equation x=(36-b)/2 square and substitute in the second equartion you get base =18 and x=9 hence you know the sides substitute in the formula area=1/2*base*height you get 1/2 * 18 * 6=54
King
  • King
b=16 not 18
anonymous
  • anonymous
ok yeah b=16 and side =10 sorry abt that.
anonymous
  • anonymous
so area is 48 not 64.
King
  • King
yup

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