CN203786962U - Perpendicular bisector theorem demonstration model - Google Patents
Perpendicular bisector theorem demonstration model Download PDFInfo
- Publication number
- CN203786962U CN203786962U CN201420204134.0U CN201420204134U CN203786962U CN 203786962 U CN203786962 U CN 203786962U CN 201420204134 U CN201420204134 U CN 201420204134U CN 203786962 U CN203786962 U CN 203786962U
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- CN
- China
- Prior art keywords
- perpendicular bisector
- chute
- definition
- model
- theorem
- 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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Abstract
The utility model discloses a perpendicular bisector theorem demonstration model. A chute and a fold are arranged on a plate. A fastening screw sliding along the chute is arranged on the chute. Rods with the same length are arranged at two ends of the fold symmetrically. A middle part of an elastic strip is hung on the fastening screw. Two ends of the elastic strip are fixed at the outer ends of the two symmetrical rods. The straight lines where the two symmetrical rods are vertical to the plate. The perpendicular bisector theorem demonstration model is simple in structure, is easy to understand, not only can demonstrate the perpendicular bisector theorem, but also can demonstrate the perpendicular bisector definition, the axisymmetric graph definition, the congruent triangle definition and determination, property theorems and the like.
Description
Technical field
The utility model relates to a kind of how much demonstrating models, belongs to teaching field.
Background technology
Students in middle and primary schools are in the time of how much perpendicular bisector theorems of study, and teacher draws on dais, blackboard, very abstract, cause student to be difficult for understanding to this, how by model demonstration, abstract thing become to visual and understandable material object, are convenient to understand and accept to necessitate.
Summary of the invention
For achieving the above object, the utility model provides a kind of perpendicular bisector theorem demonstrating model.
The scheme that solves its technical matters is: perpendicular bisector theorem demonstrating model, is characterized in that plate is provided with chute and folding; Chute is provided with the screw that tightens up along its slip; Folding two ends are arranged with isometric bar; Elastic strip mid-mounting is tightening up on screw, and two ends are cemented in the outer end of two pairs of weighing levers.
Described two pairs of weighing lever place straight lines are perpendicular with plate.
The beneficial effects of the utility model are: it is simple in structure, and easy to understand can not only be demonstrated perpendicular bisector theorem, can also demonstrate definition and judgement, the property theorem etc. of perpendicular bisector definition, zhou duicheng tuxing definition and congruent triangles
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is folding picture of the present utility model.
Embodiment
Be illustrated below in conjunction with accompanying drawing.As Fig. 1, plate 1 is provided with chute 2 and folding 4; Chute 2 is provided with and tightens up screw 3 along its slip; Folding 4 two ends are arranged with isometric bar I5, I6; Elastic strip 7 mid-mountings are tightening up on screw 3, and two ends are cemented in the outer end of two couples of weighing lever I5, I6.
Described bar I5, I6 place straight line are perpendicular with plate 1.
In the time of demonstration perpendicular bisector theorem, bar I6 is overturn to 180 ° along folding 4, and bar I5 overlaps completely, drive the elastic strip that tightens up screw 3 both sides also to overlap, as accompanying drawing 2 simultaneously.Turn screw 3 and slide into diverse location along chute 2, by folding rod I5, I6, the elastic strip that tightens up equally screw 3 both sides can overlap mutually, thus checking perpendicular bisector theorem: and on line segment perpendicular bisector, any point equates to the distance of this line segment two-end-point.It can also demonstrate definition and judgement, the property theorem etc. of perpendicular bisector definition, zhou duicheng tuxing definition and congruent triangles in addition.
Claims (2)
1. perpendicular bisector theorem demonstrating model, is characterized in that plate (1) is provided with chute (2) and folding (4); Chute (2) is provided with and tightens up screw (3) along its slip; Folding (4) two ends are arranged with isometric bar (I5), (I6); Elastic strip (7) mid-mounting is tightening up screw (3) above, and two ends are cemented in the outer end of two pairs of weighing levers (I5), (I6).
2. perpendicular bisector theorem demonstrating model according to claim 1, is characterized in that bar (I5), the same plate of (I6) place straight line (1) are perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204134.0U CN203786962U (en) | 2014-04-15 | 2014-04-15 | Perpendicular bisector theorem demonstration model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204134.0U CN203786962U (en) | 2014-04-15 | 2014-04-15 | Perpendicular bisector theorem demonstration model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203786962U true CN203786962U (en) | 2014-08-20 |
Family
ID=51323123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420204134.0U Expired - Fee Related CN203786962U (en) | 2014-04-15 | 2014-04-15 | Perpendicular bisector theorem demonstration model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203786962U (en) |
-
2014
- 2014-04-15 CN CN201420204134.0U patent/CN203786962U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20150415 |
|
| EXPY | Termination of patent right or utility model |