"Measurement of Angles" PPT courseware 3

Description

"Measurement of Angles" PPT courseware 3

teaching objectives

1. Through operations, communication and other activities, stimulate the desire to understand the measurement and measurement units of angles, then understand the protractor and the measurement units of angles, and learn to use the protractor to measure the specified angle.

2. Preliminarily feel that the sum of the interior angles of a triangle is 180°, and know that the size of the angle has nothing to do with the length of the side.

3. Cultivate the ability of observation, comparison and hands-on operation, and be able to actively participate in learning activities and obtain pleasant emotional experiences.

Divide the semicircle into 180 equal parts, and the angle subtended by each part is called a 1-degree angle. Recorded as "1°"

Steps to measure angles with a protractor

1. Place the protractor on top of the angle; make the center of the protractor coincide with the vertex of the angle;

2. The zero-degree scale line coincides with one side of the angle;

3. The scale on the protractor opposite the other side of the angle is the measure of the angle.

Classwork

Draw a few triangles, measure the measure of each angle, and calculate the sum of the three interior angles?

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

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"Measurement of Angles" PPT courseware 4:

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File Info

Update Time: 2024-11-18

This template belongs to Mathematics courseware Jiangsu Education Edition Fourth Grade Mathematics Volume 1 industry PPT template

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