Question

is this points (1-1),(5,2)and(9,5)are collinear​

Answer 1

Answer:

AB=

(5−1)

2

+(2+1)

2

=

16+9

=5

BC=

(5−9)

2

+(2−5)

2

=

16+9

=5

and, AC=

(1−9)

2

+(−1−5)

2

=

64+36

=10

Clearly, AC=AB+BC

Hence, A,B,C are collinear points.