1. Find |B|
`B=(4,3)`Solution:Here `vec A=(3,4),vec B=(4,3),vec C=(3,4)`
`|vec B|`
`=sqrt(B_1^2 + B_2^2)`
`=sqrt(4^2 + 3^2)`
`=sqrt(16 + 9)`
`=sqrt(25)`
`=5`
2. Find |B|
`B=(2,2,1)`Solution:Here `vec A=(1,2,2),vec B=(2,2,1),vec C=(1,2,2)`
`|vec B|`
`=sqrt(B_1^2 + B_2^2 + B_3^2)`
`=sqrt(2^2 + 2^2 + 1^2)`
`=sqrt(4 + 4 + 1)`
`=sqrt(9)`
`=3`
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