CN202720802U  Middle school mathematics trigonometry teaching aid  Google Patents
Middle school mathematics trigonometry teaching aid Download PDFInfo
 Publication number
 CN202720802U CN202720802U CN 201220432303 CN201220432303U CN202720802U CN 202720802 U CN202720802 U CN 202720802U CN 201220432303 CN201220432303 CN 201220432303 CN 201220432303 U CN201220432303 U CN 201220432303U CN 202720802 U CN202720802 U CN 202720802U
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 CN
 China
 Prior art keywords
 scale
 main scale
 teaching aid
 rotating shaft
 subsidiary
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 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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 238000006243 chemical reaction Methods 0.000 description 1
Abstract
The utility model discloses a middle school mathematics trigonometry teaching aid. The teaching aid comprises a main scale, scale marks arranged along a length direction of the main scale, a rotating shaft arranged on two ends of the scale marks of the main scale, and two ends of the main scale are respectively connected with a subsidiary scale. Each subsidiary scale is arranged with scale marks with the rotating shaft connected with a scale body as a zero point. Through changing position relations of the main scale and the subsidiary scales, the teaching aid can demonstrate randomly and intuitively different triangular patterns in different shapes to students, and also randomly and intuitively makes students observe proportional relations of edges and angles of various shaped triangles.
Description
Technical field
The utility model relates to teaching aid, is directly involved in the student mathematics teaching aid.
Background technology
The teaching of middle school mathematics class, the especially teaching of triangle class usually will be used the teaching aids such as ruler, set square.Yet these teaching aids are difficult at random, demonstrate difform legofmutton form to the student intuitively, thereby also are difficult to allow at random, intuitively observation of students arrive legofmutton limit, the angle proportionate relationship of various shapes.
The utility model content
The purpose of this utility model just provides a kind of improved student mathematics teaching aid, and it can effectively solve existing teaching aid and be difficult to demonstrate difform legofmutton form, be difficult to allow intuitively at random observation of students arrive the problem of the legofmutton corner proportionate relationship of various shapes to the student intuitively at random.
The purpose of this utility model is achieved in that student mathematics triangle teaching teaching aid, has main scale, along the main scale length direction scale mark is set, at described main scale scale mark two ends rotating shaft is set, the main scale two ends connect a secondary chi separately by rotating shaft, and the rotating shaft that every secondary chi all connects take blade separately arranges scale mark as starting point.
The utility model is owing to be provided with rotating shaft, main scale two ends and connect separately rotating shaft that a secondary chi, every secondary chi all connect take blade separately by rotating shaft and be provided with scale mark as starting point at main scale scale mark two ends, thereby the position relationship by conversion main scale, secondary chi, can be at random, demonstrate difform legofmutton form to the student intuitively, also can allow at random, intuitively observation of students arrive legofmutton limit, the angle proportionate relationship of various shapes.
Description of drawings
Accompanying drawing 1 is structure principle chart of the present utility model, and the utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment
Accompanying drawing shows the structure of the utility model student mathematics triangle teaching teaching aid, has main scale 2, along main scale 2 length directions scale mark is set, at described main scale 2 scale mark two ends rotating shaft 3 is set, main scale 2 two ends connect a secondary chi 1 separately by rotating shaft 3, and the rotating shaft 3 that every secondary chi 1 all connects take blade separately arranges scale mark as starting point.
When known two angles of triangle, the utility model can be demonstrated out legofmutton shape at once, and presents the proportionate relationship at each limit of triangle, angle; When the ratio on known three limits of triangle, the utility model also can be demonstrated out legofmutton shape at once, and presents the proportionate relationship at each limit of triangle, angle; When the ratio on known two limits of triangle and angle thereof, the utility model can also be demonstrated out legofmutton shape at once, and presents the proportionate relationship at each limit of triangle, angle.
In the utility model, main scale 2 can also use as conventional ruler; Main scale 2 cooperates and can draw angle at blackboard with a secondary chi 1; Main scale 2 cooperates and can draw parallel lines at blackboard with two secondary chis 1; Main scale 2 cooperates with two secondary chis 1 and can draw difform triangle at blackboard.
In the utility model, main scale 2 and secondary chi 1 preferentially select transparent material to make.
Claims (1)
1. student mathematics triangle teaching teaching aid, has main scale (2), along main scale (2) length direction scale mark is set, it is characterized in that: at described main scale (2) scale mark two ends rotating shaft (3) is set, main scale (2) two ends connect a secondary chi (1) separately by rotating shaft (3), and the rotating shaft (3) that every secondary chi (1) all connects take blade separately arranges scale mark as starting point.
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN 201220432303 CN202720802U (en)  20120822  20120822  Middle school mathematics trigonometry teaching aid 
Applications Claiming Priority (1)
Application Number  Priority Date  Filing Date  Title 

CN 201220432303 CN202720802U (en)  20120822  20120822  Middle school mathematics trigonometry teaching aid 
Publications (1)
Publication Number  Publication Date 

CN202720802U true CN202720802U (en)  20130206 
Family
ID=47622616
Family Applications (1)
Application Number  Title  Priority Date  Filing Date 

CN 201220432303 Expired  Fee Related CN202720802U (en)  20120822  20120822  Middle school mathematics trigonometry teaching aid 
Country Status (1)
Country  Link 

CN (1)  CN202720802U (en) 

2012
 20120822 CN CN 201220432303 patent/CN202720802U/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 nonpayment of annual fee 
Granted publication date: 20130206 Termination date: 20130822 