"How to Draw Circles" Circle and Sector PPT Courseware

Category	Format	Size
Hebei Education Edition Sixth Grade Mathematics Volume 1	pptx	6 MB

"How to Draw Circles" Circle and Sector PPT Courseware

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Upload Time: 2024-10-04

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Description

"How to Draw Circles" Circle and Sector PPT Courseware

teaching objectives

1. Experience the process of drawing a circle using your own method and using a compass as required.

2. Master the method of drawing a circle with a compass and know the functions of the center and radius of the circle.

3. Cultivate thinking skills such as observation, analysis, comparison, and generalization, and develop preliminary spatial concepts.

In our daily life and study, we often use compasses to draw circles.

Steps to draw a circle with a compass:

① Separate the two legs of the compass and determine the distance (i.e. radius) between the two legs;

② Fix one foot with the needle tip at one point (i.e., the center of the circle);

③ Rotate the foot with the pencil tip once to draw a circle.

give it a try

Determine the length of the radius yourself, draw a circle with a compass and mark the center and radius.

What does the size of a circle have to do with it?

The size of a circle is related to its radius.

①The smaller the radius of the circle, the smaller the circle; the larger the radius of the circle, the larger the circle.

②The position of the circle is determined by the center of the circle.

practice

1. Use a compass to draw a circle.

(1) r＝2.5cm (2) d＝4cm

2. Draw a circle as required.

3. Multiple choice questions:

(1) When drawing a circle, the distance between the two legs of the compass is ( ).

A. Radius length B. Diameter length

(2) The line segment from the center of the circle to any point ( ) is called the radius.

A. Center of circle B. Outside of circle C. On circle

(3) The point ( ) that passes through the center of the circle and both ends are on the circle is called the diameter.

A.Diameter B.Line segment C.Ray

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For more information about the "How to Draw Circles and Sectors" PPT courseware, please click the "How to Draw Circles and Sectors ppt" ppt tag.

File Info

Update Time: 2024-10-04

This template belongs to Mathematics courseware Hebei Education Edition Sixth Grade Mathematics Volume 1 industry PPT template

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Circle and sector ppt How to draw a circle ppt

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"How to Draw Circles" Circle and Sector PPT Courseware