Question

From the information given below, find which of the points is between the other two If the points are collinear, state so.
$d\left(XY\right)=15,d\left(YZ\right)=7,d\left(XZ\right)=8$

Answer 1

$d(X,Y)\Rightarrow XY=YX=15$ units

$d(Y,Z)\Rightarrow YZ=ZY=7$ units

$d(X,Z)\Rightarrow XZ=ZX=8$ units

We have $XY=YZ+ZX$

$\Rightarrow 15=7+8$

$\therefore$ the point $Z$ is in between $X$ and $Y$