Betweenness

If $P-Q-R$ and $d(P,Q)=2, d(P,R)=10$, then find $d(Q,R)$.

Find $d\left(A,B\right)$, if co-ordinates of $A$ and $B$ are $-2$ and $5$, respectively.

How many points are there in the intersection of two distinct lines?

How many lines are determined by three distinct points?

 Find $d(U,V), d(P,C), d(V,B), d(U,L).$

Write a pair of points equidistant from point $Q$

State the points which are equidistant from point $B$.