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wlbrt316

  • 4 years ago

perimeter=23 feet

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  1. Insanity
    • 4 years ago
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    area?

  2. CptnChiguire
    • 4 years ago
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    Of what figure?

  3. wlbrt316
    • 4 years ago
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    |dw:1317774831555:dw|

  4. CptnChiguire
    • 4 years ago
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    Is the whole bottom side 2x ft long?

  5. wlbrt316
    • 4 years ago
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    yes

  6. CptnChiguire
    • 4 years ago
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    The perimeter is the sum of the sides, so: x + 2x + (3 + x) = 23 4x + 3 = 23 4x = 20 x = 5

  7. wlbrt316
    • 4 years ago
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    thanks

  8. CptnChiguire
    • 4 years ago
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    Now for the area you need to find the height:

  9. wlbrt316
    • 4 years ago
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    yes but i know about that i just need the perimeter and i aslo have one more

  10. CptnChiguire
    • 4 years ago
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    Let y be the length of the left part of the bottom side, we have: y^2 + h^2 = 5^2 and: (10 - y)^2 + h^2 = 8^2

  11. wlbrt316
    • 4 years ago
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    |dw:1317775181974:dw|

  12. wlbrt316
    • 4 years ago
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    and this time perimeter=24 meteres

  13. CptnChiguire
    • 4 years ago
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    so you sum all four sides: 2x + (x+3) + 2x + (x + 3) = 24 6x + 6 = 24 6x = 18 x = 3

  14. wlbrt316
    • 4 years ago
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    i think its that way because my math teacher doesnt teach us at all and me and my classmates get confused

  15. wlbrt316
    • 4 years ago
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    thanks for explaining to me

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