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I have attached a file. Find the area of the triangle determined by the points P, Q, and R. Find a unit vector perpendicular to

I have attached a file.

Find the area of the triangle determined by the points P, Q, and R. Find a unit vector perpendicular to plane PQR . P(- 2,2, 1), Q(1,0,2), R(0, 1, - 2) The area of the triangle is . (Type an exact answer, using radicals as needed.)

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