Circle Geometry (1 Viewer)

[king chopper]

How do you prove something is colinear? I never know how to do these Questions.
What are the steps to prove it?
Cheers

 

[Carrotsticks]

Usually, you would need to assign the two angles (the ones that 'look like they're collinear) values such as x and y.

Then you would have to prove that x+y=180.

 

[deswa1]

What Carrot said is the general method. Just be very careful to avoid circular reasoning-> like a lot of people when they draw the diagram ASSUME that the points are collinear and then deduce things off that -> that's illegal because you are trying to prove its collinear. When you draw your diagram, its normally good to draw two disjointed lines just so you're aware of this

 

[iBibah]

Exactly what Carrot said, maybe post an example so we can show you.