CN201936493U - Instrument for demonstrating angle and side relation of right triangle - Google Patents
Instrument for demonstrating angle and side relation of right triangle Download PDFInfo
- Publication number
- CN201936493U CN201936493U CN2011200353344U CN201120035334U CN201936493U CN 201936493 U CN201936493 U CN 201936493U CN 2011200353344 U CN2011200353344 U CN 2011200353344U CN 201120035334 U CN201120035334 U CN 201120035334U CN 201936493 U CN201936493 U CN 201936493U
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- CN
- China
- Prior art keywords
- ruler
- angle
- instrument
- rotating
- right triangle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Length-Measuring Instruments Using Mechanical Means (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses an instrument for demonstrating the angle and side relation of a right triangle, relating to the technical field of maths teaching aids and comprising an angle gauge and a ruler; a main ruler is fixed on the straight side of the angle gauge, and the center of the angle gauge is connected with a rotating ruler through a shaft; and the rotating ruler can rotate around the shaft on the angle gauge. The rotating ruler is vertically connected with a sliding ruler through a slide block, and the sliding ruler is vertical to the rotating ruler and can slide on the rotating ruler. Scales are marked on all the main ruler, the rotating ruler and the sliding ruler. Compared with the prior art, the instrument can intuitively demonstrate the angle, the side and the function relations of the right triangle, the Pythagorean theorem and the like, increases the interests of students, and is beneficial to training the reverse thought and the deduction ability of students; in addition, the instrument is convenient to use and easy to improve, thereby being a teaching aid with a high popularization value.
Description
Technical field
The utility model relates to a kind of mathematics teaching aid and learning aid, is right-angle triangle arm of angle relation demonstration device specifically.
Background technology
In mathematical education, leg-of-mutton arm of angle relation is an emphasis, particularly right-angle triangle, how to show the relation between them visually, and existing teaching method is the figure that draws on blackboard, owing to there is error, the demonstration effect is not fine.
The utility model content
The purpose of this utility model is the problem that exists at existing teaching, and a kind of right-angle triangle arm of angle relation demonstration device is provided.
The purpose of this utility model realizes by following technological means: right-angle triangle arm of angle relation demonstration device, to form by protractor and ruler, and the straight flange of protractor is fixed with main scale, and the center is connected with the rotation chi by axle; The rotation chi can pivot on protractor.
Vertically be connected with slidably chi by slide block above the described rotation chi, slidably chi also can slide in the above perpendicular to the rotation chi.
Described main scale, rotation chi and scale mark is slidably all arranged above the chi.
Compared with prior art the utlity model has following tangible advantage: can demonstrate the right-angle triangle arm of angle and funtcional relationship intuitively, can demonstrate Pythagorean theorem or the like, increase student's interest, be convenient to cultivate student's reverse thinking and derivation ability; Easy to use, be easy to improve, be a kind of teaching aid that promotional value is arranged very much.
Description of drawings
Fig. 1 is the utility model synoptic diagram.
1. protractors wherein, 2. spool, 3. main scale, 4. rotation chi, 5. slidably chi, 6. slide block, 7. scale mark.
Embodiment
Below in conjunction with description of drawings the utility model is described in further detail:
The use of this right-angle triangle arm of angle relation demonstration device is: fixed amount hornwork 1, and will rotate chi 4 by axle 2 and rotate to certain angle as 30 °, make slidably chi 5 on rotation chi 4 certain positions by moving slider 6, hand over main scale 3 and a bit.By scale mark 7, can read the length of side of three sides of a triangle, and then can verify corner relation, funtcional relationship and frontier juncture, the limit system etc. of right-angle triangle.
In a word, the utility model provides right-angle triangle arm of angle relation demonstration device.The above; it only is a part of embodiment of the present utility model; protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. right-angle triangle arm of angle relation demonstration device is made up of protractor (1) and ruler, it is characterized in that: the straight flange of protractor (1) is fixed with main scale (3), and the center is connected with rotation chi (4) by axle (2).
2. right-angle triangle arm of angle relation demonstration device according to claim 1 is characterized in that: vertically be connected with slidably chi (5) by slide block (6) above the rotation chi (4).
3. right-angle triangle arm of angle relation demonstration device according to claim 1 is characterized in that: main scale (3), rotation chi (4) and scale mark (7) is slidably all arranged above the chi (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200353344U CN201936493U (en) | 2011-01-27 | 2011-01-27 | Instrument for demonstrating angle and side relation of right triangle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200353344U CN201936493U (en) | 2011-01-27 | 2011-01-27 | Instrument for demonstrating angle and side relation of right triangle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201936493U true CN201936493U (en) | 2011-08-17 |
Family
ID=44448009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200353344U Expired - Fee Related CN201936493U (en) | 2011-01-27 | 2011-01-27 | Instrument for demonstrating angle and side relation of right triangle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201936493U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104504964A (en) * | 2013-12-04 | 2015-04-08 | 李庆光 | Triangle corner relationship demonstrating device |
-
2011
- 2011-01-27 CN CN2011200353344U patent/CN201936493U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104504964A (en) * | 2013-12-04 | 2015-04-08 | 李庆光 | Triangle corner relationship demonstrating device |
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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: 20110817 Termination date: 20120127 |