Question

determine if the point (1,5),(2,3) and (3,-1) are collinear​

Answer 1

Answer:

A(1,5),B(2,3)andC(−2,−11)

Now, AB= (1 2 )+(2 2 ) = 5BC= (4 2 )+(14 2 = 212CA= (1 2 )+(16 2) = 257

As,CA>BC>AB

If points A,BandC are collinear then AB+BC=CA

But

5

+

212



=

257

So they are not collinear.