CN202771686U - Teaching aid for trigonometric function learning - Google Patents
Teaching aid for trigonometric function learning Download PDFInfo
- Publication number
- CN202771686U CN202771686U CN 201220507856 CN201220507856U CN202771686U CN 202771686 U CN202771686 U CN 202771686U CN 201220507856 CN201220507856 CN 201220507856 CN 201220507856 U CN201220507856 U CN 201220507856U CN 202771686 U CN202771686 U CN 202771686U
- Authority
- CN
- China
- Prior art keywords
- teaching aid
- trigonometric function
- protractor
- bolt
- utility
- 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
Links
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
Disclosed in the utility model is a teaching aid for trigonometric function learning. The teaching aid comprises a semicircular protractor; and scale marks are arranged on the straight flange, the arc-shaped edge, and the middle portion of the protractor. The teaching aid is characterized in that a support rod is fixed at the center of the circle of the protractor by a pin roll; an axial sliding chute is arranged in the middle of the support rod; and a bolt is arranged in the sliding chute. Besides, a pointed needle and a piece of string are arranged on the bolt; and a plumb bob is fixed at the lower end of the string. According to the utility model, the teaching aid has a simple structure and the abstract of the trigonometric function can be demonstrated visually, so that a trigonometric function value can be calculated conveniently and students can understand and memorize formulas conveniently.
Description
Technical field
The utility model relates to a kind of mathematics teaching aid, specifically a kind of trigonometric function study teaching aid.
Background technology
At present, the mathematics class in middle school is when the study trigonometric function, and normally teacher draws or writes formula at blackboard and cooperates teaching, and the teaching aid that uses when picture and measurement is exactly protractor and ruler, does not have special-purpose teaching aid.It is time-consuming to draw like this, and effort is not vivid, not directly perceived, makes the student be difficult for understanding this mathematical concept of trigonometric function.Especially need to measure when calculating multi-group data, just more inconvenient.
Summary of the invention
It is a kind of simple in structure, easy to use that the purpose of this utility model is to provide, and can carry out intuitively the trigonometric function study teaching aid of teaching demonstration.
In order to reach above purpose, technical scheme that the utility model adopts is: this trigonometric function study teaching aid, comprise semicircular protractor, on the straight flange of protractor and arc-shaped side and the middle part all be provided with scale, it is characterized in that: on the center of circle of protractor, by the fixing upper rack posts of bearing pin, be provided with axial chute at the middle part of pole, in chute, be provided with bolt, be provided with pointer and cord at bolt, the fixing upper plummet in the lower end of cord.
The beneficial effects of the utility model are: can be by plummet and pointer indication scale, directly read the length of facing limit and right limit at angle in the triangle, can demonstrate easily and calculate trigonometric function, can allow the student very fast, understand at an easy rate the mathematical concept of trigonometric function.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Among the figure: 1, protractor; 2, pole; 3, bolt; 4, cord; 5, plummet; 6, pointer; 7, chute.
Embodiment
Make the utility model with reference to accompanying drawing 1.This trigonometric function study teaching aid, comprise semicircular protractor 1, on the straight flange of protractor 1 and arc-shaped side and the middle part all be provided with scale, on the center of circle of protractor 1, by the fixing upper rack posts 2 of bearing pin, be provided with axial chute 7 at the middle part of pole 2, in chute 7, be provided with bolt 3, bolt 3 can be along chute 7 slips and fixing, be provided with pointer 6 and cord 4 at bolt 3, the fixing upper plummet 5 in the lower end of cord 4, pointer 6 can be along the center rotating of bolt 3.
The head of described pole 2 is point and edge overhang hornwork 1, like this can be when dip meter use, and the head of point can be inserted and play on the ground fixation.
When using the utility model, protractor 1 is attached on the blackboard puts well, the straight flange level of protractor 1, pole 2 is rotated on the angle that needs, plummet 5 is vertical with the straight flange of protractor 1, pin refer to 6 forward to protractor 1 straight flange parallel position on, just can directly read the length of facing mutually right-angle side and right limit at the angle that will study, then by calculating the numerical value of trigonometric function.
The utility model can also be made dip meter and use: pole 2 heads are inserted ground, protractor 1 straight flange is aimed at the mark, can record the elevation angle or the angle of depression of target.
Claims (1)
1. trigonometric function learns to use teaching aid, comprise semicircular protractor (1), it is characterized in that: on the center of circle of protractor (1) by the fixing upper rack posts (2) of bearing pin, be provided with axial chute (7) at the middle part of pole (2), in chute (7), be provided with bolt (3), be provided with pointer (6) and cord (4) at bolt (3), the fixing upper plummet (5) in the lower end of cord (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220507856 CN202771686U (en) | 2012-09-30 | 2012-09-30 | Teaching aid for trigonometric function learning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220507856 CN202771686U (en) | 2012-09-30 | 2012-09-30 | Teaching aid for trigonometric function learning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202771686U true CN202771686U (en) | 2013-03-06 |
Family
ID=47778245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220507856 Expired - Fee Related CN202771686U (en) | 2012-09-30 | 2012-09-30 | Teaching aid for trigonometric function learning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202771686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375603A (en) * | 2019-08-29 | 2019-10-25 | 李守良 | A kind of trigonometric function teaching aid |
-
2012
- 2012-09-30 CN CN 201220507856 patent/CN202771686U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375603A (en) * | 2019-08-29 | 2019-10-25 | 李守良 | A kind of trigonometric function teaching aid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203713333U (en) | Multifunctional mathematical teaching aid | |
| CN204820798U (en) | Compasses | |
| CN202771686U (en) | Teaching aid for trigonometric function learning | |
| CN201444362U (en) | Multifunctional combined set square | |
| CN202439433U (en) | Teaching compass | |
| CN203287012U (en) | Comprehensive slope measuring instrument | |
| CN204679019U (en) | A kind of protractor | |
| CN105150725A (en) | Multifunctional teaching aid for math class | |
| CN211280429U (en) | Multi-functional teaching aid for mathematical education | |
| CN202965698U (en) | Multifunctional compasses | |
| CN203163725U (en) | Slope survey meter | |
| CN202976596U (en) | Multifunctional measuring inclination and trigonometric function measuring instrument | |
| CN203026006U (en) | Trigonometric function measuring instrument | |
| CN202029581U (en) | Ruler for learning geographical knowledge | |
| CN206594900U (en) | A kind of trigonometric function teaching aid | |
| CN202242594U (en) | Multipurpose compasses and ruler combination | |
| CN201629093U (en) | Simple sun altitude measurer | |
| CN203282916U (en) | Mathematics teaching tool | |
| CN204605309U (en) | Multifunctional compass | |
| CN201026755Y (en) | Multi-functional ruler | |
| CN202623713U (en) | Ruler for mathematical education of primary school | |
| CN201610020U (en) | Combination of compasses and triangle | |
| CN203371962U (en) | Multipurpose ruler for geographical teaching | |
| CN203172284U (en) | Teaching compass ruler | |
| CN104097430A (en) | Radian gauge |
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: 20130306 Termination date: 20130930 |