Basic Geometrical Terms

Point - It is an exact location. It is a fine dot which has neither length nor breadth nor thickness but has position i.e., it has no magnitude. It is denoted by capital letters A, B, C, O etc.

Line segment - The straight path joining two points A and B is called a line segment

Ray - A line segment which can be extended in only one direction is called a

Line - When a line segment is extended indefinitely in both directions it forms

Collinear points - If two or more points lie on the same line, then they are called collinear points.

Non-collinear points - Points which do not lie on the same line are called as non-collinear points.

Intersecting lines - Two lines having a common point are called intersecting lines. The common point is known as the point of intersection.

Concurrent lines - If two or more lines intersect at the same point, then they are known as concurrent lines.

Plane - A plane is a surface such that every point of the line joining any two points on it, lies on it.