Point
*Has no size *tells an exact location *labled as Point x or x
Line
*Staight*has no thickness*infininite in both directions*named by two points on that line
Segment
*Part of a line *Has two endpoints labled as segment AB
Ray
*Part of a line *has one endpoint and is infinite in the other direction *letter that is the endpoint goes first when naming rays
Plane
*flat surface *infinite in all directions *has no thickness*named by three points in the plane
Collinear
Points that are on the same line
Noncollinear
Points that are not on the same line
How many points are needed to determine a line?
2
Coplanar
Points on the same plane
Noncoplanar
Points not on the same plane
How many points determine a plane?
3