# Verify that point

In a right angles triangle ABC, right angled at B, according to the pythagoras theorem

AB2 + BC2 = AC2

According to the distance formula, the distance 'd' between two points (a,b) and (c,d) is given by
.....(1)

For the given points Distance between P and Q is

PQ = =

QR = =

PR = = =

PQ2 = 16

QR2 = 25

PR2 = 41

As PQ2 + QR2 = PR2

Hence the given points form a right angled triangle.

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