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E and F are points on the sides PQ and P...

E and F are points on the sides PQ and PR respectively of a `DeltaPQR`. For the following cases, state whether EF||QR.

i] PE = 3.9 cm, EQ = 3 cm, PF = 3.6 cm, and FR = 2.4 cm.
ii] PE = 4 cm, QE = 4.5 cm, PF = 8 cm, RF = 9 cm
iii] PQ = 1.28 cm, PR = 2.56 cm, PE = 0.18 cm, and PF = 0.36 cm.

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