"Measurement of Angles" PPT teaching courseware

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"Measurement of Angles" PPT teaching courseware

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"Measurement of Angles" PPT teaching courseware

Part One: Learning Objectives

Understand the unit of angle "degree". Learn how to measure angles with a protractor and be able to measure angles correctly.

Learn important and difficult points

focus

Measure angles and compare angle sizes.

difficulty

How to measure angles with a protractor.

Measurement of angles PPT, part 2: interpretation of examples

Compare, which of the two corners below is bigger?

∠2 >∠1

You can also use the angles on a triangle ruler to measure and compare them to see which angle is larger.

I still can’t know exactly how much greater ∠2 is than ∠1, what should I do?

To accurately measure the size of an angle, it should be measured in an appropriate angle unit.

People divide the circle into 360 equal parts, and the angle subtended by one part is used as the unit of measuring angle. Its size is 1 degree, which is recorded as 1°.

Based on this principle, people made a tool for measuring angles - a protractor.

Measurement of angles PPT, part three: summary

Definition of 1°

People divide the circle into 360 equal parts, and the angle subtended by one part is used as the unit of measuring angle. Its size is 1 degree, which is recorded as 1°.

Steps to measure angles

1. Make the center of the protractor coincide with the vertex of the angle, and the 0° scale line of the protractor coincide with one side of the angle.

2. The scale on the protractor facing the other side of the angle is the measure of the angle.

Measurement of angles PPT, part 4 content: quiz in class

1. Look at the scale on the protractor and fill in the measure of each angle.

2. Measure the degrees of each angle below.

Measurement of angles PPT, part 5: homework

1. Select from the after-class exercises;

2. Complete the exercises in this lesson in the exercise book.

Keywords: Free download of PPT courseware for mathematics in the first volume of the fourth grade of the People's Education Press, download of PPT on the measurement of angles, .PPT format;

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

"Measurement of Angles (2)" Lines and Angle PPT:

"Measurement of Angles (2)" Lines and Angle PPT Part One: Exploring New Knowledge The protractor divides the semicircle into 180 equal parts. The scale on the inner circle goes from 0 to 180 counterclockwise, and the scale on the outer circle goes from 0 to 180 clockwise. Can you find the angles of 50 and 140 on the protractor? Dosage..

"Measurement of Angles (1)" Lines and Angle PPT:

"Measurement of Angles (1)" Lines and Angle PPT Part One Content: Explore new knowledge Try using a ruler. Use a triangle. Is there any special tool for measuring angles? Divide the circle into 360 equal parts, the size of the angle subtended by 1 part is called 1 degree (recorded as 1), usually 1..

"Drawing Angle" Measurement of Angle PPT:

"Drawing Corners" PPT on the Measurement of Corners Part One: Exciting Introduction Where are the horns in life? The angle between the hands of a clock, the angle of a table, the angle of a traffic sign. How to draw these angles? What tools are needed? ... ... ... Drawing angle PPT, part 2..

File Info

Update Time: 2024-07-11

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

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《角的度量》PPT教学课件(1)《角的度量》PPT教学课件(2)《角的度量》PPT教学课件(3)
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