What is the formal definition of a line?Answer:
In Geometry, a line has 3 properties
- is straight (no curves)
- has no thickness
- is infinite (in other words, it goes forever and ever in both directions)
What does that really mean?
more on straight: Lines must be straight or they would look like this.
showing infinity :We use arrows on the tips of the line to show that the line continues forever.
Unlike a line, a segment has two endpoints.