SaiBook.us Math

Home Course Section Lesson

Lesson Topics Discussion Quiz: Class Homework

Definition1

Title: Points, Line Segmaent

Grade 4+ Lesson s1-l1

Explanation: The best way to understand geometry is by looking at some definitions. Take turns and read each definition for easy understanding.

Definition

Topics → Definition Example1

Definition: Point

A point is an exact location or position with no size. It means the point has no width, no length, or no depth.
There are different types of points in geometry:
Collinear Points, Non-Collinear Points, Coplanar Points and Non-coplanar Points.

$1$

Explanation:

In this image, it shows the representation of the point.

Definition: Collinear Points & Non-Collinear Points

Points on a line are collinear. Points not on a line are non-collinear.

$2$

Explanation:

A, B & C are collinear points, D and E are non-collinear points.

Definition: Coplanar Points and Non-coplanar Points

Points on the same plane are coplanar, while those not on the same plane are non-coplanar.

$3$

Explanation:

Here, A and B, are planar whereas points C and D are coplanar; they intersect the plane.

Definition: Line Segment

A line segment is a straight, limited portion of a line with two endpoints and a measurable length.
It includes all the points between these endpoints and has a measurable length.
A line segment is usually represented by a bar (—) above the endpoints.

$4$

Explanation:

In this image, the line segment has endpoint A. It can be denoted by \$\bar AB\$.