MathematicsClass 7Lines and Angles
Basic Geometric Terms
Defining points, lines, line segments, rays, and planes in geometry.
Class 7 · MathematicsCBSE & ICSE
Definition
Basic geometric terms form the foundation of geometry. A point represents a specific position with no dimension, a line extends infinitely in both directions, a line segment is a part of a line with two endpoints, and a ray is a part of a line with one endpoint extending infinitely in one direction.
Worked examples
1
A sharp pencil tip touching paper represents a point.
2
A stretched tight rope without ends represents a line.
3
The edge of a ruler with fixed endpoints represents a line segment.
Common mistakes
- • Confusing a line with a line segment by forgetting that lines extend infinitely.
- • Thinking a ray has two endpoints instead of one.