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The area of the triangle formed by the points
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a
14194
b
12194
c
194
d
2194
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Correct option is B
The given vertices are A(1,2,3) B(-2,1,4),C(3,4,-2) The area of the triangle formed by the points A,B,C is 12|AB¯×AC¯|AB¯=−3i−j+k,AC¯=2i+2j−5kthe area of the triangle is 12|AB×AC|=12ijk−3−1122−5=12|(3i−13j−4k)|=129+169+16=1942Therefore, the area of the triangle is 1942 square unitsSimilar Questions
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