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E and F are point on the sides PQ and PQ...

E and F are point on the sides PQ and PQ and PR respectively of a `DeltaPQR` .For each of the following cases, state whether `||QR` :
PE = 4 cm , QE = 4.5 cm , PF = 8 cm and RF = 9 cm

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The correct Answer is:
`8/9`
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