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Angles Q and R of a DeltaPQR are 25^@ an...

Angles `Q and R` of a `DeltaPQR` are `25^@ and 65^@.` Write which of the following is true : (i) `PQ^2+QR^2=RP^2` (ii) `PQ^2+RP^2=QR^2` ( iii) `RP^2+QR^2=PQ^2`

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