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King

  • 4 years ago

:Help!!!!!!!.....A isosceles triangle is of height=6 cm ,perimeter=36 cm.Find its area.Please give answer with explanation @Mathematics

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  1. MightySmurf
    • 4 years ago
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    well isosceles triangles have two sides that are equal so the 2 sides are 6

  2. King
    • 4 years ago
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    how?

  3. MightySmurf
    • 4 years ago
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    |dw:1320065137428:dw|

  4. King
    • 4 years ago
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    i said height=6 |dw:1320065197358:dw|

  5. King
    • 4 years ago
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    @mightysmurf: ure diagram is wrong

  6. MightySmurf
    • 4 years ago
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    yea i messed up sorry

  7. King
    • 4 years ago
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    its ok

  8. shankvee\
    • 4 years ago
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    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

  9. King
    • 4 years ago
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    b=16 not 18

  10. shankvee\
    • 4 years ago
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    ok yeah b=16 and side =10 sorry abt that.

  11. shankvee\
    • 4 years ago
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    so area is 48 not 64.

  12. King
    • 4 years ago
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    yup

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