CN204537557U - A kind of teaching aid verifying angular bisector character - Google Patents
A kind of teaching aid verifying angular bisector character Download PDFInfo
- Publication number
- CN204537557U CN204537557U CN201520264812.7U CN201520264812U CN204537557U CN 204537557 U CN204537557 U CN 204537557U CN 201520264812 U CN201520264812 U CN 201520264812U CN 204537557 U CN204537557 U CN 204537557U
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- China
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- transparent panel
- shrinkage
- chute
- rule
- angular bisector
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Abstract
A kind of teaching aid verifying angular bisector character, comprise substrate, the first transparent panel, the second transparent panel and the 3rd transparent panel, wherein, one end of one end of first transparent panel, one end of the second transparent panel and the 3rd transparent panel is all connected on substrate by rotating shaft, centered by rotating shaft, be provided with angle index line, the first transparent panel be provided with the first chute, first shrinkage-rule vertical with the first transparent panel is connected in the first chute by sliding part; Second transparent panel is provided with the second chute, second shrinkage-rule vertical with the second transparent panel is connected in the second chute by sliding part, and the utility model can be verified angular bisector theorem, can also be used for verifying the mathematical theorems such as Pythagorean theorem simultaneously.
Description
Technical field
The utility model belongs to teaching aid field, particularly a kind of teaching aid verifying angular bisector character.
Background technology
In middle school teaching, the Important Theorems of angular bisector is: the point on bisector of angle is equal to the distance on the both sides at this angle; The point that distance to the both sides at an angle is identical, on this bisector of angle.In practice, lack a kind of demonstration means and instrument, generally all require that this theorem is memorize mechanicallyd by student, a lot of student can not understand this.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of teaching aid verifying angular bisector character, can verify above-mentioned theorem.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of teaching aid verifying angular bisector character, comprise substrate 3, first transparent panel 11, second transparent panel 21 and the 3rd transparent panel 4, wherein, one end of first transparent panel 11, one end of the second transparent panel 21 are all connected on the substrate 3 by rotating shaft 5 with one end of the 3rd transparent panel 4, centered by rotating shaft 5, be provided with on angle index line 6, first transparent panel 11 and be provided with the first chute 12, first shrinkage-rule 13 vertical with the first transparent panel 11 is connected in the first chute 12 by sliding part; Second transparent panel 21 is provided with the second chute 22, second shrinkage-rule 23 vertical with the second transparent panel 21 is connected in the second chute 22 by sliding part.
The middle part of described first shrinkage-rule 13 arranges sliding part, that is, the middle part of the first shrinkage-rule 13 is connected with the first transparent panel 11.
The middle part of described second shrinkage-rule 23 arranges sliding part, that is, the middle part of the second shrinkage-rule 23 is connected with the second transparent panel 21.
One end of described first transparent panel 11, one end of the second transparent panel 21 and the 3rd transparent panel 4 all there is length scale line.
Compared with prior art, the utility model can be verified angular bisector theorem, can also be used for verifying the mathematical theorems such as Pythagorean theorem simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of teaching aid verifying angular bisector character, comprise substrate 3 and the first transparent panel 11 with length scale line, second transparent panel 21 and the 3rd transparent panel 4, wherein, one end of first transparent panel 11, one end of second transparent panel 21 is all connected on the substrate 3 by rotating shaft 5 with one end of the 3rd transparent panel 4, centered by rotating shaft 5, be provided with angle index line 6, first transparent panel 11 is provided with along its length the first chute 12, first shrinkage-rule 13 vertical with the first transparent panel 11 is connected in the first chute 12 by the sliding part that position, intermediate portion is arranged, second transparent panel 21 is provided with along its length the second chute 22, second shrinkage-rule 23 vertical with the second transparent panel 21 is connected in the second chute 22 by the sliding part that position, intermediate portion is arranged.
Utilize this device, by the first transparent panel 11 and the second transparent panel 21 5 any rotation around the shaft, then, according to the instruction of angle index line 6, rotate the 3rd transparent panel 4, make the 3rd transparent panel 4 be positioned at the middle of the first transparent panel 11 and the second transparent panel 21, namely, using the first transparent panel 11 and the second transparent panel 21 as the both sides at angle, using the 3rd transparent panel 4 as angular bisector.Then, slide the first shrinkage-rule 13 and the second shrinkage-rule 23, and the two is when the 3rd transparent panel 4 crosses, and checks the size on the first shrinkage-rule 13 and the second shrinkage-rule 23, namely joint (point on angular bisector) is to the distance on both sides, angle, can find that two distances are equal.Make joint move on the 3rd transparent panel 4, check distance successively, the distance that can be found to both sides, angle is equal all the time.
Simultaneously, utilize the 3rd transparent panel 4, first transparent panel 11 and the first shrinkage-rule 13 as three articles of limits of right-angle triangle, by adjusting the length of angle between the 3rd transparent panel 4 and the first transparent panel 11 and the first shrinkage-rule 13, dissimilar right-angle triangle can be obtained, length again represented by respective size scale, can verify Pythagorean theorem.
Claims (4)
1. verify the teaching aid of angular bisector character for one kind, it is characterized in that, comprise substrate (3), first transparent panel (11), second transparent panel (21) and the 3rd transparent panel (4), wherein, one end of first transparent panel (11), one end of second transparent panel (21) and one end of the 3rd transparent panel (4) are all connected on substrate (3) by rotating shaft (5), centered by rotating shaft (5), be provided with angle index line (6), first transparent panel (11) is provided with the first chute (12), first shrinkage-rule (13) vertical with the first transparent panel (11) is connected in the first chute (12) by sliding part, second transparent panel (21) is provided with the second chute (22), second shrinkage-rule (23) vertical with the second transparent panel (21) is connected in the second chute (22) by sliding part.
2. the teaching aid of checking angular bisector character according to claim 1, it is characterized in that, the middle part of described first shrinkage-rule (13) arranges sliding part, that is, the middle part of the first shrinkage-rule (13) is connected with the first transparent panel (11).
3. the teaching aid of checking angular bisector character according to claim 1, it is characterized in that, the middle part of described second shrinkage-rule (23) arranges sliding part, that is, the middle part of the second shrinkage-rule (23) is connected with the second transparent panel (21).
4. the teaching aid of checking angular bisector character according to claim 1, it is characterized in that one end of described first transparent panel (11), one end of the second transparent panel (21) and the 3rd transparent panel (4) all have length scale line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520264812.7U CN204537557U (en) | 2015-04-28 | 2015-04-28 | A kind of teaching aid verifying angular bisector character |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520264812.7U CN204537557U (en) | 2015-04-28 | 2015-04-28 | A kind of teaching aid verifying angular bisector character |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204537557U true CN204537557U (en) | 2015-08-05 |
Family
ID=53751529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520264812.7U Expired - Fee Related CN204537557U (en) | 2015-04-28 | 2015-04-28 | A kind of teaching aid verifying angular bisector character |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204537557U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448357A (en) * | 2016-12-07 | 2017-02-22 | 泸县奇峰镇学校 | Device for mathematics teaching |
| CN113284397A (en) * | 2021-06-01 | 2021-08-20 | 河南城建学院 | Develop mathematical teaching aid of thinking |
-
2015
- 2015-04-28 CN CN201520264812.7U patent/CN204537557U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448357A (en) * | 2016-12-07 | 2017-02-22 | 泸县奇峰镇学校 | Device for mathematics teaching |
| CN113284397A (en) * | 2021-06-01 | 2021-08-20 | 河南城建学院 | Develop mathematical teaching aid of thinking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160428 |