CN202838747U - Area relationship demonstrator for triangles with equal bottoms and equal heights - Google Patents
Area relationship demonstrator for triangles with equal bottoms and equal heights Download PDFInfo
- Publication number
- CN202838747U CN202838747U CN 201220507968 CN201220507968U CN202838747U CN 202838747 U CN202838747 U CN 202838747U CN 201220507968 CN201220507968 CN 201220507968 CN 201220507968 U CN201220507968 U CN 201220507968U CN 202838747 U CN202838747 U CN 202838747U
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- CN
- China
- Prior art keywords
- equal
- triangles
- bottoms
- heights
- steel ball
- 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 provides an area relationship demonstrator for triangles with equal bottoms and equal heights, and relates to the technical field of a math teaching aid and learning aids. The area relationship demonstrator for triangles with equal bottoms and equal heights comprises two sliding rods with grooves, a cuboid hollow perspex sheet and a steel ball. The thickness of the cuboid hollow perspex sheet is slightly bigger than the diameter of steel ball. A groove parallel to the bottom edge is formed in one lateral of the cuboid hollow perspex sheet. Further, one ends of the two sliding rods with grooves are connected with the bottom edge through a shaft, and the other ends are intersected at the groove position and connected by a slide block in a penetrated mode. Compared with the prior art, the area relationship demonstrator for triangles with equal bottoms and equal heights are easily acquired in material, triangles with equal bottoms and heights can be presented by moving of the steel ball in the triangle-shaped container. Consequently, integration of teaching and recreation can be achieved. The area relationship demonstrator for triangles with equal bottoms and equal heights is a learning product easy to promote, convenient to operate, and especially applicable to the interests of studying for children.
Description
Technical field
The utility model relates to a kind of math teaching tool for primary school and learning aid, the contour triangle area relations presenter in the end such as is specifically.
Background technology
When primary school mathematics is learnt, need the leg-of-mutton area of explanation, and leg-of-mutton area is to multiply by high half end, i.e. S=ah/2.How to show intuitively leg-of-mutton area, how to verify their formula, allow the student be familiar with better and understand leg-of-mutton area, at present also not intuitively teaching aid and learning aid.
The utility model content
The purpose of this utility model is for the deficiencies in the prior art, provide a kind of can intuitively show triangle area etc. the contour triangle area relations presenter in the end.
The purpose of this utility model realizes by following technological means: wait the contour triangle area relations presenter in the end, be with reeded slide bar, rectangular parallelepiped hollow organic-glass plate and steel ball to form by two, the thickness of rectangular parallelepiped hollow organic-glass plate is a bit larger tham the diameter of steel ball, and a side has the groove that is parallel to the base.
Further, two ends with reeded slide bar are connected on the base by axle, and an other end intersects at groove and passes connection by slide block.
Compared with prior art, the utility model is drawn materials and is simple and easy to, by steel ball flowing at the triangular pattern container, can show with the contour leg-of-mutton area in the end, realized residing and taught in object for appreciation, teaching through lively activities, is a kind of popularization, convenient operation of being easy to, and is particularly suitable for the study product of children's hobby.
Description of drawings
Fig. 1 is the utility model schematic diagram.
Wherein 1. be with reeded slide bar, 2. rectangular parallelepiped hollow organic-glass plate, 3. groove, 4 slide blocks, 5. steel ball, 6. axle.
Embodiment
Below in conjunction with description of drawings the utility model is described in further detail:
Deng the contour triangle area relations presenter in the end, the diameter that is a bit larger tham steel ball 5 by two thickness that form rectangular parallelepiped hollow organic-glass plate 2 with reeded slide bar 1, rectangular parallelepiped hollow organic-glass plate 2 and steel ball 5, one side has the groove 3 that is parallel to the base, two ends with reeded slide bar 1 are connected on the base by axle 6, and an other end intersects at groove 3 places and passes connection by slide block 4.
During demonstration, only need steel ball 5 is full of in the triangular shaped container, move in groove 3 by moving slider 4, can form difform triangle, these triangle bases are identical, length is a, high-order h, so they for etc. the contour triangle in the end, and steel ball 5 can both be full of the triangle of various shapes just, thereby the contour leg-of-mutton area relationship in the end such as verified, illustrated that also triangle area formula is to multiply by high half end, i.e. S=ah/2.
In a word, the utility model such as provides at the contour triangle area relations presenter in the end.The above; it only is a part of embodiment of the present utility model; protection domain of the present utility model is not limited to this; 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 (2)
1. wait the contour triangle area relations presenter in the end, be with reeded slide bar (1), rectangular parallelepiped hollow organic-glass plate (2) and steel ball (5) to form by two, it is characterized in that: the thickness of rectangular parallelepiped hollow organic-glass plate (2) is a bit larger tham the diameter of steel ball (5), and a side has the groove (3) that is parallel to the base.
2. the contour triangle area relations presenter in the end such as according to claim 1, it is characterized in that: two ends with reeded slide bar (1) are connected on the base by axle (6), and an other end intersects at groove (3) and locates and pass connection by slide block (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220507968 CN202838747U (en) | 2012-09-27 | 2012-09-27 | Area relationship demonstrator for triangles with equal bottoms and equal heights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220507968 CN202838747U (en) | 2012-09-27 | 2012-09-27 | Area relationship demonstrator for triangles with equal bottoms and equal heights |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202838747U true CN202838747U (en) | 2013-03-27 |
Family
ID=47950395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220507968 Expired - Fee Related CN202838747U (en) | 2012-09-27 | 2012-09-27 | Area relationship demonstrator for triangles with equal bottoms and equal heights |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202838747U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617756A (en) * | 2013-12-17 | 2014-03-05 | 曹雨晴 | Demonstrator for verifying surface area formula of ball |
| CN107655442A (en) * | 2017-08-28 | 2018-02-02 | 广东出入境检验检疫局检验检疫技术中心 | A kind of device for determining irregular food contact material and product into contact area and preparation method thereof and application |
-
2012
- 2012-09-27 CN CN 201220507968 patent/CN202838747U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617756A (en) * | 2013-12-17 | 2014-03-05 | 曹雨晴 | Demonstrator for verifying surface area formula of ball |
| CN103617756B (en) * | 2013-12-17 | 2015-10-28 | 曹雨晴 | A kind of demonstration device verifying the surface area formula of ball |
| CN107655442A (en) * | 2017-08-28 | 2018-02-02 | 广东出入境检验检疫局检验检疫技术中心 | A kind of device for determining irregular food contact material and product into contact area and preparation method thereof and application |
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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: 20130327 Termination date: 20130927 |