A question about coplanar points? Doesn't make sense to me.
Picture:
http://prntscr.com/4peec

Question

A question about coplanar points? Doesn't make sense to me. 
Picture:
http://prntscr.com/4peec

paxpolaris · Answer

So you have intersecting Lines KJ & GH shown on a plane.
Another Line EF not in the same plane. 
All 3 Lines Intersect at Point O

anonymous · Answer

so what's the answer to #1, then? Because all the choices have E&F in them and we already said those weren't coplanar to the others

paxpolaris · Answer

Remember that any 3 NON-COLINEAR points define 1 & only 1 plane.
     Corollary: A line & a point not on the line define 1 plane
     Corollary: 2 intersecting Lines define 1 plane

paxpolaris · Answer

1a HOG are in a straight line ... E is a point not on that line .
  So EHOG are co-planar

anonymous · Answer

Starting to get it! Thank you!! So in order to make a plane, there has to be a line and a point not on the line? Are there any other ways?

paxpolaris · Answer

1a So even if is is not on the plane showed, there still is exactly one plane with points EHOG

paxpolaris · Answer

The rules of making a plane are all similar other than the 3 I mentioned above, there is also: 
2 parallel lines lie in exactly 1 plane

paxpolaris · Answer

For 1  you should get: b is _not_ coplanar... the rest are

anonymous · Answer

Okayy :) Thank you.