Question

Point P is the midpoint of seg XY. If XP = 8.5, find l(XY).

Answer 1

If P is the midpoint between XY then,
l(XP) = $\frac{l\left(XY\right)}{2}$ $\Rightarrow$ l(XY) = l(XP) $\times$ 2

Given l(XP) = 8.5 $\Rightarrow$ l(XY) = 2 $\times$ 8.5 = 17
So, l(XY) = 17