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  1. M

    One draw by autoCAD to me?

    Anyone who draws to me this scheme On the wording of AutoCAD .dwg http://store2.up-00.com/Dec10/Avo45080.jpg
  2. M

    find the angle between the diagonals?

    if A(1,-2) , B(3,6) and C(5,10) ae the three vertices of a parallelogam , find its 4 vertex D .also ,find the angle between the diagonals AC and BD.
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