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What will be the area of the triangle determined by the vectors 3i + 4j and -5i + 7j?

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in Vector algebra by (64.9k points)

What will be the area of the triangle determined by the vectors 3i + 4j and -5i + 7j? 

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Area = 1/2|(3i + 4j) x (-5i + 7j)| 

= 1/2|21k + 20k| = 41/2

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