Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook