CN203311695U - Demonstration instrument for Pythagorean theorem - Google Patents
Demonstration instrument for Pythagorean theorem Download PDFInfo
- Publication number
- CN203311695U CN203311695U CN2013203204641U CN201320320464U CN203311695U CN 203311695 U CN203311695 U CN 203311695U CN 2013203204641 U CN2013203204641 U CN 2013203204641U CN 201320320464 U CN201320320464 U CN 201320320464U CN 203311695 U CN203311695 U CN 203311695U
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- CN
- China
- Prior art keywords
- right angle
- ruler
- rule
- pythagorean theorem
- shrinkage
- 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 relates to a demonstration instrument for the Pythagorean theorem. The demonstration instrument for the Pythagorean theorem comprises a right angle triangle ruler and a telescopic ruler, wherein each of the two right angle sides of the right angle triangle ruler is provided with a slide groove parallel to the right angle side where the slide groove is arranged, the fixed end of the telescopic ruler is a fastening screw clamped in the slide groove of the vertical side of the right angle triangle ruler, the fastening screw is provided with a fastening screw nut, the moving end of the telescopic ruler has a cylindrical rotary type telescopic band structure, the bottom end of the moving end is clamped in the slide groove of the horizontal side of the right angle triangle ruler, the two right angle sides of the right angle triangle ruler and the telescopic ruler are provided with graduation lines, and the graduation of 0 is close to the fixed end. The telescopic ruler of the demonstration instrument for the Pythagorean theorem is a sliding inclined side; in actual teaching processes, digits on the two right angle sides and the telescopic ruler can be directly read by changing the length and the position of the telescopic ruler, verification can be realized through a formula, and therefore the basic concept of the Pythagorean theorem can be displayed in a visually direct manner, the interest of teaching is increased, convenience of operation is brought to teachers, and teaching efficiency is improved.
Description
Technical field:
The utility model relates to a kind of math teaching aid, relates in particular a kind of Pythagorean theorem demonstration instrument device.
Background technology:
Pythagorean theorem is one of theorem famous in elementary geometry, and it has pointed out the quantitative relation between right-angle triangle three limits, namely " in right angle trigonometry, square sum of two right-angle side a, b equal hypotenuse c square ", mathematical formulae is " a
2+ b
2=c
2"; but in the field research process; due to demonstration teaching aid intuitively not; the student is in learning process; only can apply mechanically formula, the concept of profound understanding Pythagorean theorem not, the teacher is when teaching; constantly on blackboard, draw different triangles for verifying the mathematical formulae of Pythagorean theorem, also can not help intuitively the student to understand this theorem.
The utility model content:
The purpose of this utility model is for the deficiencies in the prior art part, a kind of Pythagorean theorem demonstration instrument device is provided, shrinkage-rule is the slip hypotenuse of drawing square, in teaching process, by changing the length and location of shrinkage-rule, directly read the numeral on two right-angle sides and shrinkage-rule, in conjunction with formula checking Pythagorean theorem, help the student to understand more intuitively the key concept of Pythagorean theorem, increase the interest of imparting knowledge to students.
Technology solution of the present utility model is as follows:
A kind of Pythagorean theorem demonstration instrument device, it is characterized in that: comprise drawing square and shrinkage-rule, on two right-angle sides of described drawing square, be respectively arranged with the chute that is parallel to the place right-angle side, the stiff end of described shrinkage-rule is that holding screw is stuck in the chute of drawing square vertical edge, and holding screw is provided with clamp nut; The movable end of described shrinkage-rule is rotating cylindrical telescopic band structure, and its bottom is stuck in the chute of drawing square horizontal sides, and the movable end of shrinkage-rule is provided with clamp nut; On two right-angle sides of described drawing square, shrinkage-rule, all be carved with scale mark.
" 0 " scale on described shrinkage-rule is near the stiff end place, and " 0 " scale of two right-angle sides of drawing square all is arranged near place, summit, right angle.
The beneficial effects of the utility model are:
The utility model is simple in structure, shrinkage-rule is the slip hypotenuse, in the field research process, by changing the length and location of shrinkage-rule, directly read the numeral on two right-angle sides and shrinkage-rule, in conjunction with formula, verify, the key concept of showing more intuitively Pythagorean theorem, increase the interest of teaching, facilitate operation of teacher, improve efficiency of teaching.
The accompanying drawing explanation:
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the novel front view of this use.
Embodiment:
The following stated is only preferred embodiment of the present utility model, not scope of the present utility model is limited.
With reference to attached Fig. 1 and 2, a kind of Pythagorean theorem demonstration instrument device, comprise drawing square 1 and shrinkage-rule 2, all be carved with scale mark on two right-angle sides of described drawing square 1, shrinkage-rule 2, be respectively arranged with the chute 11 that is parallel to the place right-angle side on two right-angle sides of drawing square 1; The stiff end 21 of described shrinkage-rule 2 is stuck in for holding screw in the chute 11 of drawing square 1 vertical edge, by clamp nut 3, holding screw is fixed in chute 11; The movable end 22 of described shrinkage-rule is rotating cylindrical telescopic band structure, its bottom is stuck in the chute 11 of drawing square 1 horizontal sides, shrinkage-rule 2 is the slip hypotenuse, in the field research process, change the length and location of shrinkage-rule 2, by the clamp nut 3 on the movable end 22 of shrinkage-rule 2, be fixed in the chute 11 of drawing square 1 horizontal sides; " 0 " scale on described shrinkage-rule 2 is fixed 21 end places near shrinkage-rule, and " 0 " scale of two right-angle sides of drawing square 1 all is arranged near place, summit, right angle, directly reads the numeral at two right-angle sides and shrinkage-rule movable end 22 places, in conjunction with formula " a
2+ b
2=c
2" checking, make the teaching process vivid and interesting, help the student to understand intuitively the key concept of Pythagorean theorem, improve efficiency of teaching.
Claims (2)
1. Pythagorean theorem demonstration instrument device, it is characterized in that: comprise drawing square (1) and shrinkage-rule (2), on two right-angle sides of described drawing square (1), be respectively arranged with the chute (11) that is parallel to the place right-angle side, the stiff end of described shrinkage-rule (1) is that holding screw is stuck in the chute (11) of drawing square (1) vertical edge, and holding screw is provided with clamp nut (3); The movable end of described shrinkage-rule (2) is rotating cylindrical telescopic band structure, and its bottom is stuck in the chute (11) of drawing square (1) horizontal sides, and the movable end of shrinkage-rule (2) is provided with clamp nut (3); Two right-angle sides, the shrinkage-rule of described drawing square (1) all are carved with scale mark on (2).
2. a kind of Pythagorean theorem demonstration instrument device according to claim 1 is characterized in that: " 0 " scale on described shrinkage-rule (2) is near the stiff end place, and " 0 " scale of two right-angle sides of drawing square (1) all is arranged near place, summit, right angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203204641U CN203311695U (en) | 2013-06-05 | 2013-06-05 | Demonstration instrument for Pythagorean theorem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203204641U CN203311695U (en) | 2013-06-05 | 2013-06-05 | Demonstration instrument for Pythagorean theorem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203311695U true CN203311695U (en) | 2013-11-27 |
Family
ID=49617886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203204641U Expired - Fee Related CN203311695U (en) | 2013-06-05 | 2013-06-05 | Demonstration instrument for Pythagorean theorem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203311695U (en) |
-
2013
- 2013-06-05 CN CN2013203204641U patent/CN203311695U/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: 20131127 Termination date: 20140605 |