1. /TVS and RSV are right angles (given)
2. ZTVS RVS (Right Z Thm.)
3. Vis midpoint of TR (given)
4. TV VR (Def. of bisector)
5. TSRS (given)
6. VS bisects ZRST (given)
7. ZVRS≈ /TSV (Def. of midpoint)
B
8. VS SV (Reflex. Prop. of)
9. /T≈ ZR (Third angles Thm.)
10. ATSVA RSV (Def. of congruent triangles)