a compass
Points do not extend, lines do.
No. Pencil's like a ray. It extends only In One direction
No, a ray extends infinately in one direction; but this can be any direction at all
No. Parallel lines are lines that extend in the same direction. In a triangle the lines go in different directions.
If you extend the perimeter by 3 feet in each direction, you will get a new rectangle 18 ft by 21 ft with a perimeter of 78 feet (18+21+18+21 = 78)
A flat surface that extend infinitely in all directions is called a plane.
These are called microvilli which means shaggy hair. They are tiny hairlike folds in the plasma membrane that extend from the surface of some cells. They are be seen as a "brush border" with a light microscope.
The prominences of the sun are bright features that extend outward from its surface. These are anchored to the sun's surface in the photosphere, called the corona.
A group of points that extend forever in all directions is called a plane. We often draw a plane with edges, but it really has no edges.
Extend in one or more directions.
yes
It is a line.
Foramen
A straight line without any defined end points
6:00
Solar prominences are plasma rings that extend from the surface of the Sun, on outward.
line. :D