Problem
Given the circle below with secants \( \overline{S T U} \) and \( \overline{W V U} \), find the length of \( \overline{S T} \). Round to the nearest tenth if necessary.
Solution
Step 1 ：Let \(m(\angle STU)=a\) and \(m(\angle VWU)=b\)
Step 2 ：Apply angle-bisector theorem: \(\frac{ST}{SV} = \frac{TU}{UW}\)
Step 3 ：\(ST = \frac{SV*TU}{UW}\)
