Question

# If P, Q, R are three points on a line and Q lies between P and R, then PR - PQ = ______.PQPQRQRPR

Solution

## The correct option is C 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 Hence, PR - PQ = QR

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