CN202189489U - Mathematics teaching tool - Google Patents
Mathematics teaching tool Download PDFInfo
- Publication number
- CN202189489U CN202189489U CN2011202675376U CN201120267537U CN202189489U CN 202189489 U CN202189489 U CN 202189489U CN 2011202675376 U CN2011202675376 U CN 2011202675376U CN 201120267537 U CN201120267537 U CN 201120267537U CN 202189489 U CN202189489 U CN 202189489U
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- angle
- arc
- tool
- guide groove
- edge
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- Expired - Fee Related
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Abstract
The utility model provides a mathematics teaching tool which is convenient for the drawing of arcs and straight lines and comprises a semicircular tool body; the specialty lies in that the central position of the semicircular tool body is provided with a triangle cavity; the tool body edge is provided with an arc guide groove in cooperation with line drawing chalk; the external edge of the arc guide groove is provided with an arc edge provided with angle display numbers; three edges of the triangle cavity are all provided with scales for indicating length sizes. According to the utility model, the semicircular tool body is provided with the triangle cavity and the arc guide groove; the edges of the triangle cavity are provided with scale display numbers and the arc edge is provided with angle display numbers, in such a way that the mathematics teaching tool can draw straight lines according with length requirements and arcs according with angle requirements in a convenience and rapid way.
Description
Technical field
The utility model relates to a kind of mathematical education and uses instrument, in particular, relates in particular to a kind of mathematical education of being convenient to picture circular arc and straight line and uses instrument.
Background technology
The mathematical education of junior middle school, senior middle school is crucial, and the good mathematical teaching helps the student and lays good, solid mathematical theory, helps student's mathematical studying and other section's purpose study from now on.Algebraically, how much two sub-accounts as mathematical education, in the process of teaching, straight line, circle and circular arc are the curves of the most often using; In order to make teacher can in the shortest time, make figure on the classroom, teacher carries compasses, ruler and set square on class through regular meeting, and not only instrument is various, and can influence teacher's mapping efficient.If a kind of instrument simple in structure can be arranged, can make teacher make the image of standard with the shortest time in when teaching, both improved efficiency of teaching, also guaranteed quality of instruction.
Summary of the invention
The utility model has overcome the shortcoming of above-mentioned technical matters, provides a kind of mathematical education of being convenient to picture circular arc and straight line to use instrument.
For realizing above-mentioned purpose, the utility model has adopted following technical scheme:
The mathematical education of the utility model is used instrument; Comprise semicircle body of tool; Its special feature is: the middle position of said semicircle body of tool is provided with triangular cavity; The marginal position of body of tool is provided with the arc guide groove that matches with the setting-out chalk, and the outward flange of this arc guide groove is the arc edge that is provided with the angle registration; Be provided with the scale that indicates length scale on three edges of said triangular cavity.Arc guide groove is used for matching with the setting-out chalk, so that make the circular arc of standard; The angle registration that is provided with on the arc edge is used to characterize the size of the many corresponding angles of drawn circular arc.Because triangular cavity is provided with the scale that is used to indicate length scale, this just makes it use as ruler.
The mathematical education of the utility model is used instrument, and said triangular cavity is a right-angle triangle, and triangular cavity comprises hypotenuse, first right-angle side and second right-angle side, and the length of second right-angle side is the half the of hypotenuse length.In the process of teaching, the right-angle triangle that angle is respectively 30 °, 60 ° and 90 ° is the most commonly used, is provided with this right-angle triangle form to triangular cavity, and is more easy to use.
The mathematical education of the utility model is used instrument, and the angle registration that is provided with on the said arc edge is 0～180 °.Be provided with after the angle registration, satisfactory circular arc is more prone to draw.
The beneficial effect of the utility model is: the utility model is through being provided with triangular cavity and arc guide barrel on semicircular body of tool; And the scale registration is set on the edge of triangular cavity and the angle registration is set on arc edge, make that using the utility model to draw easily and fast meets the straight line of length and meet the circular arc that angle requires.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1 body of tool, 2 arc guide barrels, 3 triangular cavities, 4 arc edges, 5 hypotenuses, 6 first right-angle sides, 7 second right-angle sides.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
As shown in Figure 1, provided the structural representation of the utility model, it comprises body of tool 1, arc guide barrel 2, triangular cavity 3, arc edge 4, hypotenuse 5, first right-angle side 6, second right-angle side 7; Shown body of tool 1 is a semi-circular shape; Triangular cavity 3 is arranged on the middle position of body of tool 1, and three limits of triangular cavity 3 are provided with the scale that indicates length scale, for more convenient to use; Can be set to right-angle triangle to triangular cavity 3; Its three limits are respectively hypotenuse 5, first right-angle side 6 and second right-angle side 7, and the length of second right-angle side 7 is the half the, more easy to use like this of hypotenuse 5 length.Arc guide barrel 2 is arranged on the marginal position of body of tool 1, is used for matching with the chalk of on blackboard, writing, so that the circular shape of the standard of drawing.The marginal position place of arc guide barrel 2 is an arc edge 4, and this arc edge 4 is provided with angle index, meets the circular arc of angular dimension so that draw through scale.
The utility model through arc guide barrel 2 and the cooperation that is arranged on arc edge 4 upper angle scales, can be made satisfactory circular arc in the process of using; Can make satisfactory straight line and triangle through triangular cavity 3.
Claims (3)
1. a mathematical education is used instrument; Comprise semicircle body of tool (1); It is characterized in that: the middle position of said semicircle body of tool (1) is provided with triangular cavity (3); The marginal position of body of tool is provided with the arc guide groove (2) that matches with the setting-out chalk, and the outward flange of this arc guide groove is the arc edge (4) that is provided with the angle registration; Be provided with the scale that indicates length scale on three edges of said triangular cavity.
2. mathematical education according to claim 1 is used instrument; It is characterized in that: said triangular cavity (3) is a right-angle triangle; Triangular cavity comprises hypotenuse (5), first right-angle side (6) and second right-angle side (7), and the length of second right-angle side is the half the of hypotenuse length.
3. mathematical education according to claim 1 and 2 is used instrument, it is characterized in that: it is 0～180 ° that said arc edge (4) is gone up the angle registration that is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202675376U CN202189489U (en) | 2011-07-27 | 2011-07-27 | Mathematics teaching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202675376U CN202189489U (en) | 2011-07-27 | 2011-07-27 | Mathematics teaching tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202189489U true CN202189489U (en) | 2012-04-11 |
Family
ID=45920925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202675376U Expired - Fee Related CN202189489U (en) | 2011-07-27 | 2011-07-27 | Mathematics teaching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202189489U (en) |
-
2011
- 2011-07-27 CN CN2011202675376U patent/CN202189489U/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: 20120411 Termination date: 20120727 |