can two parallel lines be coplanar?
2006-10-09 12:25:54 · 6 answers · asked by JoAnna 2 in Science & Mathematics ➔ Mathematics
now, If three points are collinear, are they also coplanar?
2006-10-09 12:31:10 · update #1
Yes to both parts.
2006-10-09 12:34:24 · answer #1 · answered by hayharbr 7 · 0⤊ 1⤋
Not only can they...
they MUST be coplanar, otherwise they are called "skew".
Now go do your own homework.
EDIT:
ok, maybe you are struggling with "coplanar".
Just like "coworker" (share the same job place), coplanar means to share the same plane.
Imagine the top of a table as being a plane. Anything you put on that plane will be coplanar. If you put three coasters on the table top, they have to be coplanar.
Collinear means to share the same line. If three points share the same line, then they have to be coplanar, because that line will sit on one plane...imagine your three coasters all lined up in a row.
Now three non-collinear points may, or may not, share the same plane. Coasters on a table do. But if one of the coasters falls to the floor, and two remain on the table, then those three points are no longer coplanar...they are on different planes.
Try to think of your Geometry homework in terms of real life scenarios...your teacher should be presenting it like that anyways, I hope!
2006-10-09 19:27:28 · answer #2 · answered by powhound 7 · 2⤊ 1⤋
yes
2006-10-09 19:28:31 · answer #3 · answered by Mariko 4 · 1⤊ 0⤋
they have 2 b coplaner
2006-10-09 19:28:15 · answer #4 · answered by city 3 · 0⤊ 1⤋
They can be. They also might be on two different planes too, though.
2006-10-09 19:34:02 · answer #5 · answered by flit 4 · 0⤊ 2⤋
yes they have to be
2006-10-09 19:38:31 · answer #6 · answered by chuBBz 2 · 0⤊ 1⤋