Question
Suppose $S$ is between $R$ and $T$. Use the Segment Addition Postulate to solve for each variable.$$\begin{aligned}&R S=3 x+1\\&S T=\frac{1}{2} x+3\\&R T=18\end{aligned}$$
Step 1
This means that the length of segment $RT$ is equal to the sum of the lengths of segments $RS$ and $ST$. This is the Segment Addition Postulate. So, we can write the equation: \[RS + ST = RT\] Show more…
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