This is because they are not forming triangles.... 

slope  when you take  (1,3) and (0,8/3) comes equal to 1/3 

when take  ( 82,30) and (1,3)  comes equal to 1/3 

means all three are collinear with 1/3 at starting point

More explanation:-

First of all 

Don't panic after seeing big values of co-ordinate....because they are arranged in such manner..that you can easily solve it....many term will be canceled out ...

A ( 0,8/3 )                                  B(1,3)                                    C ( 82,30) 

Slope of AB   =  (3-8/3)/(1-0)  =  1/3 

Slope of   CB =  (30-3)/(82-1) = 27/81 = 1/3 

And it is not possible that two side in a triangle has same slope.....so obviously this co-ordinate is not forming any triangle,,,:D