Chapter 13.2, Problem 83E

a.

To determine

To show: The value of $u+v+w$ is 0.

b.

To determine

To show: The identities $M_1=\frac{u}{2}+v$, $M_2=\frac{v}{2}+w$ and $M_3=\frac{w}{2}+u$.

c.

To determine

To show: The values of $a,b,\text{ and }c$ is $\frac{\left(u-w\right)}{3}$.

d.

To determine

To conclude: The median intersect at a point that divides each median in a 2:1 ratio.