What are the names of three collinear points

Well it depends on what type of graph your using the points could be anything from 1-2, 3-4, 5-6 to something like a->b c->d e->g
or so on...

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)