Colinear Points (1 Viewer)

[Lukybear]

In circle geometry, to prove three points are collinear, say A,B,C, do you have to prove that AB and BC are part of a cyclic quad? Then you prove AB and BC are supplementary.

Or can you just prove directly that AB and BC are supplementary

 

[hscishard]

I have no idea on what you just said.

If you mean prove that the angles are supp, then I guess it'll depend on the question.

 

[random-1006]

you will need to post an example question ( with picture) so we know what your on about