CN202758517U - Plane geometry teaching demonstrating device - Google Patents
Plane geometry teaching demonstrating device Download PDFInfo
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- CN202758517U CN202758517U CN 201220322523 CN201220322523U CN202758517U CN 202758517 U CN202758517 U CN 202758517U CN 201220322523 CN201220322523 CN 201220322523 CN 201220322523 U CN201220322523 U CN 201220322523U CN 202758517 U CN202758517 U CN 202758517U
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Abstract
The utility model provides a plane geometry teaching demonstrating device, composed of four right-angle sectors. The first right-angle sector (1) and the second right-angle sector (2), the second right-angle sector (2) and the third right-angle sector (3), and the third right-angle sector (3) and the fourth right-angle sector( 4) are connected via loose-leafs (5) respectively, and the loose-leafs (5) are arranged at the right-angle edges of the right-angle sectors respectively. The plane geometry teaching demonstrating device of the utility model is simple in structure, low in cost and convenient in use, and can demonstrate the plane geometry angle, circle and fraction visually, so that the students can understand easily.
Description
Technical field
The utility model relates to a kind of education demonstrator, particularly a kind of education demonstrator of plane geometry.
Background technology
In the primary school period, right angle, the straight angle and round angle are the contents of courses very important in the mathematical education, yet, for the pupil, be again one of more indigestible course, student and teacher need intuitively targetedly teaching aid.Because there not being similar teaching aid, the student can only give an oral account understanding with the teacher in the existing teaching, and pupil's indigestion is particularly to the lack of perceptual knowledge that concerns between right angle, the straight angle and the round angle.Therefore bring certain difficulty to teaching, be difficult to reach preferably teaching efficiency.
The utility model content
The utility model purpose: the purpose of this utility model provides a kind of simple in structure, easy geometry teaching demonstration device of understanding.
Technical scheme: the utility model provides a kind of geometry teaching demonstration device, by four right angle fan-shaped compositions, between fan-shaped and the second right angle, the first right angle is fan-shaped, the second right angle is fan-shaped and the 3rd right angle fan-shaped between, the 3rd right angle is fan-shaped and the 4th right angle connects by loose-leaf respectively between fan-shaped, described loose-leaf is located at respectively on the fan-shaped right-angle side in right angle.
A kind of preferred as the utility model education demonstrator, described loose-leaf is located at fan-shaped right-angle side middle part, right angle.
Another kind as the utility model education demonstrator is preferred, and described loose-leaf is located on the same plane.
Another kind as the utility model education demonstrator is preferred, and the fan-shaped arc in described right angle is provided with bevel protractor.
Another kind as the utility model education demonstrator is preferred, and the right-angle side that is not provided with loose-leaf that described the first right angle is fan-shaped and the 4th right angle is fan-shaped is provided with length ruler.
When teaching is used, expand into the straight angle by the right angle first like this, expand into round angle by the right angle again, can allow the student probe into contact between right angle, the straight angle, the round angle visual in imagely.At the teaching bowlder, show first 1/4 circle, showing 1/2 circle, be launched into again full circle, can allow the student be easy to understand fully 1/4 circle and the relation of 1/2 circle with full circle.When the Preliminary study of teaching mark, also can be used as the audiovisual aids of mark teaching in addition.
Beneficial effect: the geometry teaching demonstration device that the utility model provides is simple in structure, with low cost, easy to use, can show by the vivid angle to plane geometry, circle and mark, and the student is understood easily.
Description of drawings
Fig. 1 is the education demonstrator structural representation of embodiment 1; 1 is that the first right angle is fan-shaped, and 2 is that the second right angle is fan-shaped; 3 is that the 3rd right angle is fan-shaped; 4 is that the 4th right angle is fan-shaped.
Fig. 2 is that the education demonstrator first of embodiment 1 uses constitutional diagram.
Fig. 3 is that the education demonstrator second of embodiment 1 uses constitutional diagram.
Fig. 4 is that the education demonstrator the 3rd of embodiment 1 uses constitutional diagram.
Fig. 5 is the education demonstrator structural representation of embodiment 2; 6 is bevel protractor, and 7 is length ruler.
Embodiment
The geometry teaching demonstration device, by four right angle fan-shaped compositions, between the first right angle fan-shaped 1 and the second right angle fan-shaped 2, between the second right angle fan-shaped 2 and the 3rd right angle fan-shaped 3, connect by loose-leaf 5 respectively between the 3rd right angle fan-shaped 3 and the 4th right angle fan-shaped 4, loose-leaf 5 is located at respectively fan-shaped right-angle side middle part, right angle, and loose-leaf 5 all is located on the same plane.
Plane geometry education demonstration device, substantially the same manner as Example 1, difference only is: the fan-shaped arc in right angle is provided with bevel protractor 6; The right-angle side that is not provided with loose-leaf at the first right angle fan-shaped 1 and the 4th right angle fan-shaped 4 is provided with length ruler 7.
Claims (5)
1. geometry teaching demonstration device, it is characterized in that: by four right angle fan-shaped compositions, connect by loose-leaf (5) respectively between the first right angle fan-shaped (1) and the second right angle fan-shaped (2), between the second right angle fan-shaped (2) and the 3rd right angle fan-shaped (3), between the 3rd right angle fan-shaped (3) and the 4th right angle fan-shaped (4), described loose-leaf (5) is located at respectively on the fan-shaped right-angle side in right angle.
2. a kind of geometry teaching demonstration device according to claim 1 is characterized in that: described loose-leaf (5) is located at fan-shaped right-angle side middle part, right angle.
3. a kind of geometry teaching demonstration device according to claim 1, it is characterized in that: described loose-leaf (5) is located on the same plane.
4. a kind of geometry teaching demonstration device according to claim 1, it is characterized in that: the fan-shaped arc in described right angle is provided with bevel protractor (6).
5. a kind of geometry teaching demonstration device according to claim 1, it is characterized in that: the right-angle side that is not provided with loose-leaf of described the first right angle fan-shaped (1) and the 4th right angle fan-shaped (4) is provided with length ruler (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322523 CN202758517U (en) | 2012-07-05 | 2012-07-05 | Plane geometry teaching demonstrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322523 CN202758517U (en) | 2012-07-05 | 2012-07-05 | Plane geometry teaching demonstrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202758517U true CN202758517U (en) | 2013-02-27 |
Family
ID=47737686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220322523 Expired - Fee Related CN202758517U (en) | 2012-07-05 | 2012-07-05 | Plane geometry teaching demonstrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202758517U (en) |
-
2012
- 2012-07-05 CN CN 201220322523 patent/CN202758517U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20130705 |