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.

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- bobobox

##### 1 Attachment

- Loser66

"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.

- Loser66

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

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## More answers

- Loser66

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

- bobobox

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

- AnimalLover8

I got these.

##### 1 Attachment

- AnimalLover8

Please let me know if I am wrong. :)

- Loser66

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

- bobobox

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

- AnimalLover8

I put the correct colors over the bubble.

- Loser66

|dw:1441202656725:dw|

- bobobox

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

- AnimalLover8

They always have more than three points.

- bobobox

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

- Loser66

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.

- Loser66

*plane

- bobobox

oh okay.

- bobobox

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

- bobobox

why thank you

- Loser66

|dw:1441203028663:dw|

- Loser66

You are correct for the rest.

- bobobox

really? Thats good,okay let me send you what i end up with

- bobobox

##### 1 Attachment

- Loser66

2 planes contain the same point: green

- bobobox

which place I am trying to find which bubble

- Loser66

right top corner one.

- bobobox

Yay thank you! @Loser66 I am going to reaqd through my next lesson, could you possibly help me with my next assignments after I take a crack at them? DO you have email? or instagram?

- Loser66

a line and a plane intersect at exactly 1 point: green
it is always true if the line is not on the plane
it is sometimes true if the line is on the plane. In this case, it is not "exactly 1 point" but "infinite many points"
Hence it is green

- bobobox

Thank you!

- Loser66

3lines that are //|dw:1441203736397:dw|

- Loser66

Hence it is green

- Loser66

2 planes that are // contain the same point : Red, never be!!

- Loser66

|dw:1441203833079:dw|

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