Question

Can someone double check my hw? I am redoing it and I just want to make sure I have it right. It's saying if posulates are true sometimes true or never true.

Answer 1

"2 planes contain the same point" : sometimes, it is true.
Logic: if 2 planes intersect, their intersection is a line and the line has many points. All points belongs to both planes --> 2 planes contain the same point is correct.

Answer 2

Four points lie on the same plane: sometimes, it is false --> green.

Answer 3

A line contain 4 non-coplanar pionts : Always wrong --> red

Answer 4

@Loser66 thank you so much! Are those the onnly ones?

Answer 5

I got these.

Answer 6

Please let me know if I am wrong. :)

Answer 7

A plane contain 3 points: red
Logic: a plane contain many points, not just 3

Answer 8

@AnimalLover8 I don't really understand the way you marked that

Answer 9

I put the correct colors over the bubble.

Answer 10

@Loser66 wait what about the one where you said a plane contains a three points is wrong, but cant they contain three at somepoint?

Answer 11

They always have more than three points.

Answer 12

Oh I thought in order to have a plane you had to have three points

Answer 13

when they say "a plane contains a 3 points" they meant the plane has exactly 3 points, no more.
You are correct when saying 3 points form a plane but it doesn't mean that plain contains just those 3 points.

Answer 14

*plane

Answer 15

oh okay.

Answer 16

now which oe were you referring to when you drew that picture

Answer 17

why thank you