11. In the adjoining figure, ABC is a triangle. Through A, B and C lines are drawn parallel to BC, CA andAB respectively, which forms a triangle PQR. Show that2(AB + BC + CA) = PQ + QR + RP.

11. In the adjoining figure, ABC is a triangle. Through A, B and C l

1.	11. In the adjoining figure, ABC is a triangle. Through A, B and C lines are drawn parallel to BC, CA andAB respectively, which forms a triangle PQR. Show that2(AB + BC + CA) = PQ + QR + RP.
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11. In the adjoining figure, ABC is a triangle. Through A, B and C lines are drawn parallel to BC, CA andAB respectively, which forms a triangle PQR. Show that2(AB + BC + CA) = PQ + QR + RP.​

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11. In the adjoining figure, ABC is a triangle. Through A, B and C lines are drawn parallel to BC, CA andAB respectively, which forms a triangle PQR. Show that2(AB + BC + CA) = PQ + QR + RP.