If P, Q, R are three points on a line and Q lies between P and R, then PR - PQ =
A
QR
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B
PR
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C
PQ
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D
PQR
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Solution
The correct option is A QR In the figure, PR coincides with PQ + QR Euclid’s 4th axiom says that " Things which coincide with one another are equal to one another ".
Therefore, it can be deduced that PQ + QR = PR.
Now, substituting this value of PR in the given equation PR - PQ = PQ + QR - PQ = QR