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  1. ... should see that the triangle DEF, trapezoid ABED, and trapezoid ACFD all combine to form the huge trapezoid BCFE. Area (DEF) = ...

    1 Answers · Science & Mathematics · 14/03/2010

  2. .... d) Because AD || CF and AC || DF, ACFD is a parallelogram. e) vector AC = vec(AB) + vec(BC). ...

    1 Answers · Science & Mathematics · 10/02/2012

  3. ... =80°; âBDC =40°; âECD= 30°; âEFD= 70°; sin(âCFD)=sin(70); ♥ prove ΔEDC and ΔEDF are similar...

    8 Answers · Science & Mathematics · 21/04/2008

  4. ... ABCD ABED ABFD ACBD ACED ACFD AEBD AECD AEFD AFBD AFCD AFED...

    2 Answers · Science & Mathematics · 09/01/2008

  5. 1. 40 cm2 2. 48 cm2 3. 250 cm2

    3 Answers · Science & Mathematics · 30/09/2012

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    1 Answers · Science & Mathematics · 04/08/2009

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