"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Courseware 2

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"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Courseware 2

The image of line segments, rays, and straight lines

A line segment has two endpoints and cannot be extended

A ray has an endpoint and can extend infinitely in one direction

It has no endpoints and can extend infinitely in both directions.

Discuss:

1. In life, what objects can be approximated as line segments, rays, and straight lines?

2. What are the connections and differences between line segments, rays and straight lines?

Get hands-on and explore new knowledge

1. (The teacher shows a wooden bar, several nails, a wooden board and related tools) To fix a wooden bar on the wooden board with nails, it is required to use as few nails as possible. How many nails are needed at least?

2. We jointly discovered that there is only one straight line passing through two points.

3. Student exchange: Give examples of the application of this property in life

How many straight lines can be drawn through one point? How many straight lines can be drawn through two points?

How many straight lines can be drawn through any two of the three points?

Which of the following statements is correct ( )

A. Line segment AB and line segment BA are the same line segment

B. Ray AB and ray BA are the same ray

C. Line AB and line BA are the same straight line

D. Ray AB and line segment AB correspond to the same figure;

When a carpenter saws wood, he usually draws two points on the board, and then draws an ink line through these two points. The reason is_______.

There are four points on a line segment AB: C, D, E, F. Then there are _______ line segments that can be marked with letters.

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For more information about the PPT courseware "Basic Plane Figures, Line Segments, Rays and Straight Lines", please click on the Basic Plane Figures PPT Line Segments, Rays and Straight Lines PPT tab.

"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Courseware Download:

"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Courseware Download Part One Content: Study Guide 1. Understand the concepts of line segments, rays, and straight lines and their differences and connections in real situations. (Key Points) 2. Be able to use different methods Represents line segments, rays, straight lines...

"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Teaching Courseware:

"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Teaching Courseware Part One Content: Learning Objectives 1. Understand the concepts of line segments, rays, and straight lines and their differences and connections in real situations. (Key Points) 2. Be able to use different methods Represents line segments, rays, straight lines...

"Line segments, rays, straight lines" basic plane graphics PPT download:

"Line Segments, Rays, Straight Lines" Basic Plane Graphics PPT Download Part One Content: Learning Objectives 1. Understand the descriptive definitions and representation methods of line segments, rays, and straight lines in real situations, understand the properties of straight lines, and fully feel the meaning contained in life rich and colorful..

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Update Time: 2024-11-24

This template belongs to Mathematics courseware Beijing Normal University Edition Seventh Grade Mathematics Volume 1 industry PPT template

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