| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Sixth Grade Mathematics Volume 1 | pptx | 6 MB |
"Sector" Circle and sector PPT courseware
Description
"Sector" Circle and sector PPT courseware
Important and difficult points to learn:
Key points: Understand the characteristics of the fan shape and understand the relationship between the fan shape and the circle.
Difficulty: being able to draw a sector in a circle.
The concept of sector:
A sector is bounded by two radii and a curve on the circle. A sector is a part of a circle. As shown below:
Arc and central angle:
(1) The part between two points A and B on the circle is called an arc. Pronounced: arc AB. (As shown on the right)
(2) The vertex is at the center of the circle and ∠AOB composed of two radii is called the central angle. (As shown on the right)
The relationship between the central angle and the size of the sector:
(1) Draw sectors with different central angles: Draw sectors with central angles of 30°, 60°, 90°, and 120° in the same circle.
①Draw a circle.
②Draw central angles of 30°, 60°, 90°, and 120°.
③Show the drawn fan shape (as shown on the right).
(2) Compare size: A＜B＜C＜D
(3) Conclusion: In the same circle, the size of the sector is related to the size of its central angle. If the central angle is large, the corresponding fan shape will be large; if the central angle is small, the corresponding fan shape will be small.
In conclusion:
1. A sector is bounded by two radii and a curve on the circle.
2. In the same circle or equal circles, the fan shape with a large central angle is large, and the fan shape with a small central angle is small.
Keywords: circle and sector teaching courseware, sector teaching courseware, Hebei Education Edition sixth grade mathematics volume PPT courseware download, sixth grade mathematics slide courseware download, circle and sector PPT courseware download, sector PPT courseware download, .PPT format;
For more information about the "Circle and Sector" PPT courseware, please click the Circle and Sector ppt Sector ppt tag.
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File Info
Update Time: 2024-07-09
This template belongs to Mathematics courseware Hebei Education Edition Sixth Grade Mathematics Volume 1 industry PPT template
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