Exercise 1.1.21

Question

The three sides of the dashed triangle are $v-u$ and $w-v$ and $u-w$. Their sum is Draw the head-to-tail addition around a plane triangle of $(3,1)$ plus $(-1,1)$ plus $(-2,-2)$

Prakash Anand · Accepted Answer

The sum is $(\boldsymbol{v}-\boldsymbol{u})+(\boldsymbol{w}-\boldsymbol{v})+(\boldsymbol{u}-\boldsymbol{w})=$ zero vector. Those three sides of a triangle are in the same plane!

Exercise 1.1.21

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Exercise 1.1.21

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