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Math Help - trapezoids

  1. #1
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    trapezoids

    i cant get this problem. i need some help like in a major way.

    so here is the problem...how do i get this started? what are the trapezoid rules?

    thanks in advance...
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  2. #2
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    Re: trapezoids

    Why are you calling this a trapezoid AND a parallelogram?

    Your wording refers to the parallelogram as ABCD but diagram shows ABDF; please clarify...
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  3. #3
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    Re: trapezoids

    Actually I think it question is worded quite clearly.
    Here is some notation to add in the discussion.
    Let \{H\}=\overline{GC}\cap\overline{AE}
    For lengths of line segments let AE=\text{ the length of }\overline{AE} .
    Now \text{the area of }\Delta AGH=(0.5)(GH)(HA).
    The area of the trapezoid \square EHCD=(0.5)[ED+CH](HE).
    Add those together.
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  4. #4
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    Re: trapezoids

    Quote Originally Posted by Plato View Post
    Actually I think it question is worded quite clearly.
    Here is some notation to add in the discussion.
    Let \{H\}=\overline{GC}\cap\overline{AE}
    For lengths of line segments let AE=\text{ the length of }\overline{AE} .
    Now \text{the area of }\Delta AGH=(0.5)(GH)(HA).
    The area of the trapezoid \square EHCD=(0.5)[ED+CH](HE).
    Add those together.
    ok why did you multiply by HE for the area of the trapezoid?
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  5. #5
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    Re: trapezoids

    Quote Originally Posted by slapmaxwell1 View Post
    ok why did you multiply by HE for the area of the trapezoid?
    Do you know how to determine the area of a trapezoid?
    If not, look it up.
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  6. #6
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    Re: trapezoids

    looking it up now...
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  7. #7
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    Re: trapezoids

    ok A = a(B1 + B2)/2
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