Question

If a point Q lies between two points P and R such that line PQ=line QR.prove that line PQ=1/2 line PQ

Answer 1

Draw a line PR and make a point Q such that PQ =PR
Now we know that PQ+QR=PR
We can put PQ at the place of PR
So PQ+PQ=PR
2PQ=PR
PQ=PR/2