#### orchidpsycho

##### New member

- Joined
- Sep 26, 2005

- Messages
- 41

1. Show that the points(7,3) and (3,7) are the same distance from the origin.

2. Show that points A(-1,3), B(3,11), and C(5,15) are collinear by showing that d(A,B)+d(B,C)=d(A,C)

and help to get me started would be great. My book does'nt seem to cover these. The top one seems obvious when graphed but I assume they want and equation?