"Understanding of Circles" Circle PPT Courseware

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"Understanding of Circles" Circle PPT Courseware

In every corner of our humanity, circles play an important role and become the messenger and incarnation of beauty. Let us enjoy it together:

Can you figure out how to draw a circle using the objects or tools you have at hand?

Let’s see who can draw fast and well

Steps to draw a circle with compass

1. Separate the two legs of the compass and determine the distance between them;

2. Fix one foot with the needle tip on one point;

3. The foot with the pencil rotates around the point.

discuss:

(1) How many radii and how many diameters can be drawn in the same circle?

(2) In the same circle, are the lengths of the radii the same? What about the length of the diameter?

(3) What is the relationship between the diameter and radius of the same circle?

(4) Is a circle an axially symmetrical figure? How many axes of symmetry does it have?

judge

(1) Only 100 diameters can be drawn in the same circle. ( )

(2) The diameters of all circles are equal. ( )

(3) The line segment with both ends on the circle is called the diameter. ( )

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Update Time: 2024-11-24

This template belongs to Mathematics courseware Jiangsu Education Edition Fifth Grade Mathematics Volume 2 industry PPT template

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