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FInding the area of pentagon (on x,y,z axis) using trinagles?

  1. Oct 17, 2012 #1
    Hi,
    I need to do this for some homework and I don't really understand... could anyone help with the following question:

    Find the area of the pentagon PQRST with vertices P = (1,1,1), Q = (5,−3,1), R = (9, −1, −5), S = (2, 6, −5), T = (1, 2, 0). Hint: divide the pentagon into triangles.

    Thankyou!
     
  2. jcsd
  3. Oct 17, 2012 #2
    Draw the pentagon on a piece of paper. Identify the non-overlapping triangles defined by the points you're given. Calculate the area of each of these triangles. Add them together.
     
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