You can
put this solution on YOUR website!Is this what the figure looks like:
Note: points N and R are not necessarily the midpoints
Here's a two column proof
| Statement | Reason |
| 1. Segment MP = Segment QS | Given |
| 2. Segment NP = Segment QR | Given |
| 3. MN + NP = MP | Segment Addition Postulate |
| 4. QR + RS = QS | Segment Addition Postulate |
| 5. NP + RS = QS | Substitution (see statement 2) |
| 6. MN + NP = NP + RS | Substitution (see statement 1) |
| 7. MN = RS | Addition Property of Equality |
Note: In statement 1, it is given that MP = QS. Since MP = MN + NP and QS = NP + RS, I did a substitution and plugged in these expressions into MP = QS to get MN + NP = NP + RS.