For A(1,0,2), B(3,1,−1), C(2,4,0), find the area of triangle ABC.

Question

G1 Physics · Accepted Answer

AB=(2,1,−3), AC=(1,4,−2). AB×AC=(10,1,7), magnitude=√150=5√6. Triangle area=(1/2)×5√6=5√6/2.