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1. collinear = points on the same line
coplanar = points in the same plane

2. remember the other problem? two rays w/ the same endpoint and form a line are opposite rays

so 2 is two rays w/ the same endpoint and form a line are opposite rays

right...

|dw:1439933624959:dw|

right

#4 the teacher didnt really explain........

4. I'm not really sure, it would depend on which geometric figure you're talking about

this is mainly on plains and points like that

So that could be the answer?

well, it's a start, I would flesh it out with more details, and in complete sentences, etc.