SaiBook.us Geometry

Lesson

Title: Points & Line Segmaent

Grade: 4-a Lesson: S1-L1

Explanation: Hello students, let us learn a new topic in geometry today with definitions, concepts, examples, and worksheets included.

Lesson:

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: Here A,B & C are collinear points and D,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, B, and C are coplanar whereas point D is non-coplanar as it does not lie on the same plane.

Definition: Line Segment

A line segment refers to a straight and limited portion of a line that has two endpoints and a measurable length.

It includes all the points that lie between these endpoints and has a measurable length.

A line segment is usually represented by the bar symbol (—) on top of the endpoints.

$4$

Explanation: In this image,line segment has endpoints A and . It can be denoted by \$\bar(AB)\$