Basic geometric objects
Distinguish basic geometric objects and represent their relationships.
Meaning
A point indicates position. A straight line extends indefinitely in both directions, and a plane is a flat surface extending indefinitely in two dimensions. A segment has two endpoints; a ray has one starting point.
Example
Segment AB between points A and B has a measurable length, but the entire line through them has no ends. The ray from A toward B starts at A. A line drawn briefly on paper still extends indefinitely mathematically. Do not distinguish a segment from a line just by its drawn length.
Practice for this concept
Scope and references
Topics
Points, lines, surfaces, straight lines, segments, rays
Learning goal
Distinguish basic geometric objects and represent their relationships.
Helpful background
Observe shapes around you and describe positions and boundaries.
Basic geometric objects
These choice exercises use stated geometric conditions. They do not establish construction, drawing, spatial manipulation, written proof, or mastery of the whole geometry area.