Triangles in SpaceIn Exercise,a. Find the area of the
Chapter 12, Problem 15E(choose chapter or problem)
Problem 15E
Triangles in Space
In Exercise,
a. Find the area of the triangle determined by the points P, Q, and R.
b. Find a unit vector perpendicular to plane PQR
P(1, , Q(2,0, R(0,2,1)
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