According to the distance formula, the distance 'd' between two points (a,b) and (c,d) is given by
1. LM = =
MN = =
NL = =
As sum of any two sides are greater than the third side,
The following points form a scalene triangle.
2. PQ = =
QR = =
RP = =
As PQ + QR < RP
The following points donot form a triangle.
3. AB = = 4
BC = = = 4
AC = = 4
As AB = BC = AC
The following points form an equilateral triangle.
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