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Math Help - Area of quadrilateral

  1. #1
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    Question Area of quadrilateral

    I am having problems doing the following (please have a look at the attached figure):

    A diagonal of a quadrilateral is 40 m long & the perpendiculars to it from the opposite corners are 8 m & 10 m respectively. Find its area. Here
    AC=40 m, DE=8 m & BF=10m.
    Attached Thumbnails Attached Thumbnails Area of quadrilateral-quad.gif  
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  2. #2
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    Quote Originally Posted by rn5a View Post
    I am having problems doing the following (please have a look at the attached figure):

    A diagonal of a quadrilateral is 40 m long & the perpendiculars to it from the opposite corners are 8 m & 10 m respectively. Find its area. Here
    AC=40 m, DE=8 m & BF=10m.
    area of quadrilateral = Area \triangle ADC + Area \triangle ABC

    Area \triangle ADC = \frac{1}{2}\times AC \times DE

    Area \triangle ABC = \frac{1}{2}\times AC \times BF
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