| Number | Statement | Reason |
|---|
| 1. | Line RX is perpendicular to line ST | Given |
| 2. | Line RX is congruent to line RX | Reflexive Property of Congruence |
| 3. | X is the midpoint of line ST | Given |
| 4. | Angle RXS = angle RXT | All perpendicular angles are congruent (and equal to 90 degrees) |
| 5. | SX is congruent to TX | Definition of Midpoint (uses line 3) |
| 6. | Triangle SRX is congruent to triangle TRX | SAS Property of Congruence (uses lines 2,4,5) |
| 7. | Line RS is congruent to RT | CPCTC |