Recent content by steele1

  1. steele1

    Prove area of triangle is given by cross products of the vertex vectors....

    so 1/2|VxW| would give the area, VxW=(A-B)x(C-B), could you foil and get AxC-AxB-BxC+BxB, and BxB=0, and -AxB=BxA, and -BxC=CxB. So I end up with 1/2|(AxC)+(BxA)+(CxB)| which is all backwards. @stevendaryl
  2. steele1

    Prove area of triangle is given by cross products of the vertex vectors....

    haha yup, wow I feel dumb. thought way too into that. So you have V=A-B and W=C-B.
  3. steele1

    Prove area of triangle is given by cross products of the vertex vectors....

    I'm honestly not sure how to go about doing that.
  4. steele1

    Prove area of triangle is given by cross products of the vertex vectors....

    Homework Statement The three vectors A, B, and C point from the origin O to the three corners of a triangle. Show that the area of the triangle is given by 1/2|(BxC)+(CxA)+(AxB)|. Homework EquationsThe Attempt at a Solution I know that the magnitude of the cross product of any two vectors...