Through A,B and C lines RQ,PR and QP have been drawn, respectively parallel to sides BC,CA and AB of a ΔABC as shown in figure. Show that BC=12QR.

Through A,B and C lines RQ,PR and QP have been drawn, respectively par

1.	Through A,B and C lines RQ,PR and QP have been drawn, respectively parallel to sides BC,CA and AB of a ΔABC as shown in figure. Show that BC=12QR.
Answer» Through $A, B$ and $C$ lines $R Q, P R$ and $Q P$ have been drawn, respectively parallel to sides $B C, C A$ and $A B$ of a $Δ A B C$ as shown in figure. Show that $B C = \frac{1}{2} Q R$ .