The mid-points of the side of a triangle...

The mid-points of the side of a triangle PQR are labelled as D, E and F. If the perimetre of the triangle PQR is 480 m, what is the perimetre of triangle DEF?

(A) 120m

(B) 720 m

(C ) 960 m

(D) 240 m

A

B

C

D

A

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