The area of the triangle with one vertex at the origin, and made by the three vectors, -4j+5i,4j, and 5i, is?

a)20 b)9 c)1 d)unlimited

The area of the triangle with one vertex at the origin, and made by the three vectors, -4j+5i,4j, and 5i, is?
if one vertex is at the origin and two of the vectors are 4j and 5i


then the other two vertices are the points (5,0) %26amp; (0,4)





thus you have a right triangle with legs 4 %26amp; 5 units...


the area of the triangle should be (1/2)4*5 = 10





it was not on the choices...





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