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Finding area of quadrilateral from coordinates

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A, left parenthesis, minus, 5, comma, minus, 5, right parenthesis, B, left parenthesis, minus, 4, comma, minus, 6, right parenthesis, C, left parenthesis, 2, comma, minus, 3, right parenthesis, and D, left parenthesis, 1, comma, 2, right parenthesis are the vertices of a quadrilateral A, B, C, D.
Find the area of A, B, C, D.
Area equals
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
sq. units