Points, Lines, and Planes

[Hannanstl]

so basically any two points can colinear but just not coplaner?

[gdawgrapper]

@Hannanstl Any two points are by definition collinear and define one line. But any two points are also coplanar, but are coplanar for an infinite number of planes that rotate around that line which is defined by those two points. Thanks for viewing and commenting.

[Hannanstl]

@gdawgrapper i got it now :) appreciate the response back :) :)

[tippilicious123]

awk music bro but good stuff

[MizzJLi]

This was very helpful, thank you very much

[shampooaplatypus]

thank you!!! it helped a lot with my geometry.

i was so frustrated at first now i finally understand!

[Monkey76335]

thank u your video helped me



[voletmoonblaze]

Oh thank god XD I'm in 9th grade an I am working on geometry for the first time tonight. I feel so lost

[RATATAT245]

omgosh i just started Geometry in high school so glad i found this video i felt like a total idiot!

[SchoolBoyToTheRescue]

Thank you so much! This helped a lot!

[NothingAtAllXD]

Suppose the legs of a tripod are used on a sloped surface. The length of each leg is modified so that the base of the surveying device is level with the horizon. Are the tips of the legs coplanar? PLEASE HELP!

[gdawgrapper]

@NothingAtAllXD I think the answer is "yes." My reasoning goes to the definition of a plane. Any 3 points, which the tips of a tripod are, form a plane. Nothing else mentioned matters. I think that all that stuff about length of each leg modified, etc., is a detractor trying to lure you away from the true definition and a "yes" answer. I could be wrong, but I don't think so.

[NothingAtAllXD]

@gdawgrapper Can a plane be sloped? Does a plane have thickness?

[gdawgrapper]

@NothingAtAllXD A plane can be at an angle relative to a line or another plane plane if that's what you mean by sloped. A plane has no thickness. To provide a plane with thickness, you would actually need two parallel planes, the thickness really being the space between two parallel planes, but that's two planes and not one plane.

[NothingAtAllXD]

@gdawgrapper Thank you by the way for answering me on these. So that means that the tripod legs are not on the same slope?

[gdawgrapper]

@NothingAtAllXD I don't understand the total context of your problem, I'm sure, but those tripod leg tips create their own slope or plane by definition and I don't know if they are using slope and plane synonomously. You'll have to use your own sense on this one.

[swmerideth]

@gdawgrapper The Ends of the tripod are coplanar. But the plane determined is not necesarily parallel to any particular slope of the incline. To determine slope of a plane, One must first determine the space in which the plane resides.

[gdawgrapper]

@swmerideth I wish our friend NothingAtAllXD had been around to see your reply. I'll copy yours and make a response to him/her. Thanks.

[gdawgrapper]

@NothingAtAllXD One of my viewers, swmerideth, responded to your question as follows:

The Ends of the tripod are coplanar. But the plane determined is not necesarily parallel to any particular slope of the incline. To determine slope of a plane, One must first determine the space in which the plane resides.

swmerideth 1 hour ago

[sugarNspice59]

Thanks soo much!

[12smartcookie2499]

thanks.

at 3:36 it says that point D isn't coplanar with plane s or points A B and C.

i had a similar question like that for my homework. so, let's say it was this picture in the video. she would say that point D IS coplanar with points A B and C. shes like "you have to imagine a plane there" like WTF.

someone please explain? she did the same with this rectangular prism and she said to imagine a diagonal plane ???

[gdawgrapper]

@12smartcookie2499 I just took a look. I assume you're talking about your teacher. For a set of points to be coplanar, all named points have to be on the same plane, and A, B, C, and D are not because of point D. However, you could say that A, B, and D are coplanar, or B, C, and D, and even A, C, and D. Any three points in space are coplanar, but not any four unless we move D up to that plane common to plane ABC. If it's as it seems to me, I think your teacher's wrong. Thanks for question.

[peacelovepink06]

this helped alot THANK YOU!:)

[MrMarvin12365]

thanks alot whoever made this.....

[doglover4303]

thanks this has helped a lot!

[twp333]

1000th view.

[marvinneptali]

thanks allot but i still dont get some parts can you tell me where can i find it!

[gdawgrapper]

It depends on what you want. The two places I go to most often are: You Tube if I'm looking for a video lesson and Google if I want a web site to tell me about it.  I just type in the words I want defined or explained and I'll often find something perfect. If you typed in "complementary angles" for instance in either Google or You Tube, you will find some good stuff on it I'm certain.

[123mrdream]

Thanks, i pray to god that i pass my quiz, this helped me a lot in studying

[ffflipsnake]

Lovin' that background music.

[SilverMchowl]

Thank you! This helps a lot and cleared up the confusion I was having.

[alisarap]

ta !!!!!!!!!!!!!!!!!!

[happyface3457]

thank you