"Understanding of Circles" Circle PPT Courseware 7

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"Understanding of Circles" Circle PPT Courseware 7

discuss:

1. Why are the wheels made round and where should the axles be installed?

2. If the wheels were made into square or triangular shapes, how would we feel when we sat on them?

Group cooperation inquiry requirements:

(1) Put four people into a group and fold, measure, compare, and draw together. What did you find? and communicate within the group.

(2) Prepare to share your findings with everyone.

Let’s do it together:

1. Ask students to draw a radius on a round piece of paper. Wait for 10 seconds to see how many lines they can draw. What about diameter?

2. Ask the students to use a ruler to measure how many centimeters the drawn radius is? what have you found? What about diameter?

3. Please divide into groups of four to discuss: In the same circle, what are the characteristics of the radius? What are the characteristics of diameter? What's the relationship between them?

How to draw a circle: determine the radius, determine the center, and rotate once

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 on one point (i.e. the center of the circle)

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

1. Judgment:

(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. ( )

(4) The radii of equal circles are all equal. ( )

2. 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

We discover circles from the things around us, understand and master the characteristics of circles, and know how to use circles in daily life. Circles are everywhere in the universe, and many secrets of circles have not yet been discovered. Students should work hard to explore the circle and make your contribution to the progress of science and technology!

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For more information about the "Understanding Circles" PPT courseware, please click the "Understanding Circles ppt" circle ppt tag.

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Update Time: 2024-06-07

This template belongs to Mathematics courseware Western Normal University Edition Sixth Grade Mathematics Volume 1 industry PPT template

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