Solution:-
From the dimensions given in the question,
Consider the ∆PQR
So, PQ/PA = 12.5/5
= 2.5/1
PR/PB = (PB + BR)/PB
= (4 + 6)/4
= 10/4
= 2.5
By comparing both the results,
2.5 = 2.5
Therefore, PQ/PA = PR/PB
So, AB is parallel to QR.
5.