238. Find a vector normal to a plane consisting of points p1(0,1,0), p2(1,0,1) and p3(0,0,1) a) –j – k b) –i – j c) –i – k d) –i – j – k
238. Find a vector normal to a plane consisting of points p1(0,1,0), p2(1,0,1) and p3(0,0,1) a) –j – k b) –i – j c) –i – k d) –i – j – k
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Answer: a
Explanation: Distance vector from p1 and p2 is a = i – j + k. Distance vector from p1 and
p3 is b = –j + k. The vector normal to these points is a X b = -j – k.