Answer
Statements
1. $\angle$TSW with $\overline{SU}$ and $\overline{SV}$
4. m$\angle$TSW=m$\angle$TSU+m$\angle$USV+m$\angle$VSW
Reasons
1. Given
2. Angle Addition Postulate
3, Angle Addition Postulate
Work Step by Step
Statement 1 is given in the problem. Statements 2 and 3 can be proven by different applications of the Angle Addition Postulate with the given information. Statement 4 is the desired conclusion that can reached using the Substitution Property of Equality.