"Classification of Angles" Measurement of Angles PPT

Description

"Classification of Angles" Measurement of Angles PPT

Part One: Lesson Objectives

1. Through physical display and operation activities, understand the straight angles and circumferential angles, and be able to find out the straight angles and circumferential angles in life.

2. Through teaching, know the formation process of acute angles, right angles, obtuse angles, straight angles and circumferential angles, and understand the relationship between various angles.

3. Cultivate practical operation ability and logical thinking ability.

Classification of angles PPT, part 2: exploring new knowledge

Which of the two corners below is larger? How much bigger?

There is an angle on the set ruler that is a right angle. Use a protractor to measure it. How many degrees is this right angle?

All are 90°

1right angle=90°

An angle can be thought of as a figure formed by a ray rotating from one position to another around its endpoints.

The angle formed by a ray rotating half a revolution about its endpoint is called a right angle.

Draw a straight angle!

1 straight angle = 180°

The two sides of a right angle lie on the same straight line.

What would it look like if we rotated this ray around?

When a ray rotates around its endpoint, the angle formed is called the circumferential angle.

Classification of angles PPT, part 3: Consolidation exercises

Fill it out

1. The angle in ( ) is an acute angle, and the angle in ( ) is an obtuse angle.

2. 1 circumferential angle = ( ) straight angle = ( ) right angle = ( ) degree.

3. An acute angle and a right angle can form an ( ) angle.

Classification of angles PPT, part 4 content: Class summary

What did you gain from today’s study?

Today I learned the formation process of acute angles, right angles, obtuse angles, straight angles and circumferential angles, and understood the relationship between various angles.

Keywords: Free download of PPT courseware for fourth-grade mathematics from the People's Education Press, PPT download of the classification of angles, PPT download of the measurement of angles, .PPT format;

For more information about the "Measurement of Angles and Classification of Angles" PPT courseware, please click on the "Measurement of Angles PPT Classification of Angles PPT" tag.

"Classification of Angles" PPT teaching courseware on the measurement of angles:

"Classification of Angles" The Measurement of Angles PPT Teaching Courseware Part One Content: Review and Introduce Riddles A thing is held in the hand, the wind does not move, the wind does not move, the wind does not move, the wind does not move, the summer is coming and the joy is coming! Grab some daily necessities Review old knowledge and use a protractor to measure the angle below..

"Classification of Angles" Measurement of Angles PPT Download:

"Classification of Angles" Measurement of Angles PPT Download Part One: Interesting Introduction: Measuring the angles on the clock face. What are these angles? Do you know how many degrees they have? Do you know any other characters? What are their characteristics? ... ... ... Classification of angles..

"Classification of Angles" PPT:

"Classification of Angles" PPT Right angle = 90 Acute angle less than 90 Angle obtuse angle greater than 90 but less than 180 Straight angle = 180 1 straight angle = 2 right angle Circumferential angle = 360 1 circumferential angle = 2 straight angle = 4 right angle Keywords: Hebei Education Edition 6 Free download of mathematics PPT courseware for the second volume of grade 2, Angular...

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Update Time: 2024-11-22

This template belongs to Mathematics courseware People's Education Press Fourth Grade Mathematics Volume 1 industry PPT template

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