"Vertical" Basic Plane Graphics PPT Courseware 2

Description

"Vertical" Basic Plane Graphics PPT Courseware 2

Draw vertical lines by hand

Can you use a set ruler to draw two mutually perpendicular straight lines?

How do you tell if two straight lines you draw are perpendicular to each other?

Explore question string

1. Can you draw (fold) a perpendicular line to a known straight line past a point? This shows the existence

2. In the same plane, how many straight lines can be drawn (folded) through a point that are perpendicular to the known straight line? This shows the uniqueness

3. Does the position of "this point" need to be specially explained? Uncertainty

Perpendicular property 1: In the same plane, there is only one straight line perpendicular to the known straight line passing through a point.

1. What do you think are the key words in this property?

2. If "in the same plane" is removed, is this property still correct? Can you give a counterexample?

3. Let’s talk about how we should understand and grasp this property from what aspects?

As shown in the picture, a student has reached point O in the 100-meter race. Finally, he sprints towards the finish line AB. How should he run the shortest distance to AB? And express the shortest distance.

Supplementary homework

1. As shown in the figure, point C on straight line AB leads to two rays CE and CD through point C, and ∠ACE=31° and ∠DCB=59°. What is the positional relationship between CE and CD? Why?

2. As shown in the picture, please use triangles, rulers, pencils, scissors and other tools to cut the quadrilateral cardboard ABCD into a rectangular cardboard.

Keywords: Basic plane graphics courseware, vertical courseware, Beijing Normal University edition seventh grade mathematics volume 1 PPT courseware, seventh grade mathematics slide courseware download, basic plane graphics PPT courseware download, vertical PPT courseware download, .ppt format

For more information about the "Vertical Basic Plane Figures" PPT courseware, please click on the Vertical ppt Basic Plane Figures ppt tab.

"Composition and Vertical Stratification of the Atmosphere" PPT download of the atmosphere on Earth:

"The Composition and Vertical Stratification of the Atmosphere" The Earth's Atmosphere PPT Download Part One: Explanation of the Course Standards 1. Combined with chart materials, explain the main composition and functions of the atmosphere. 2. Use the schematic diagram of the vertical stratification of the atmosphere to analyze the stratification and characteristics of the atmosphere in the vertical direction. ..

"Composition and Vertical Stratification of the Atmosphere" Atmosphere on Earth PPT courseware:

"The Composition and Vertical Stratification of the Atmosphere" The Earth's Atmosphere PPT Courseware Part One Content: Learning Objectives: 1. Use chart information to explain the composition and vertical stratification of the atmosphere. 2. Use examples to explain the relationship between the composition and vertical stratification of the atmosphere and production and life. .....

"Composition and Vertical Stratification of the Atmosphere" Atmosphere on Earth PPT:

"The Composition and Vertical Stratification of the Atmosphere" The Earth's Atmosphere PPT Part One Content: The Composition and Function of the Atmosphere The Earth's Atmosphere Body Armor Parasol Insulation Changes in the Ratio of Atmospheric Components Due to Human Activities: Mainly Shown as the C02 Ratio increase..

File Info

Update Time: 2024-11-19

This template belongs to Mathematics courseware Beijing Normal University seventh grade first volume mathematics industry PPT template

Preview