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 p

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