CN103280139A - Instrument for demonstrating Pythagorean theorem - Google Patents
Instrument for demonstrating Pythagorean theorem Download PDFInfo
- Publication number
- CN103280139A CN103280139A CN 201310221951 CN201310221951A CN103280139A CN 103280139 A CN103280139 A CN 103280139A CN 201310221951 CN201310221951 CN 201310221951 CN 201310221951 A CN201310221951 A CN 201310221951A CN 103280139 A CN103280139 A CN 103280139A
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- Prior art keywords
- ruler
- angle
- rule
- telescopic
- shrinkage
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Abstract
The invention relates to an instrument for demonstrating the Pythagorean theorem. The instrument for demonstrating the Pythagorean theorem comprises a right-angle triangular ruler and a telescopic ruler. Sliding chutes which are parallel to right-angle sides where the sliding chutes are located are respectively formed in the two right-angle sides of the right-angle triangular ruler. The fixed end of the telescopic ruler is clamped in the sliding chute of a vertical side of the right-angle triangular ruler through a fastening screw. A fastening nut is arranged on the fastening screw. The moving end of the telescopic ruler is of a cylinder rotation type telescopic band structure. The bottom end of the telescopic ruler is clamped in the sliding chute of a horizontal side of the right-angle triangular ruler. Scale marks are marked on the two right-angle sides of the right-angle triangular ruler and the telescopic ruler. Zero scale on the telescopic ruler is close to the fixed end. The telescopic ruler is a sliding oblique side. In the practical teaching process, numbers in the two right-angle sides and the telescopic ruler are directly read by changing length and position of the telescopic ruler, formula verification is combined, the fundamental concept of the Pythagorean theorem is intuitively represented, interestingness of teaching is improved, a teacher can conveniently operate, and teaching efficiency is improved.
Description
Technical field:
The present invention relates to a kind of mathematical education instrument, relate to a kind of Pythagorean theorem demonstration instrument in particular.
Background technology:
Pythagorean theorem is one of theorem famous in the 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; because 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 draw the mathematical formulae that different triangles is used for checking Pythagorean theorem at blackboard, also can not help the student to understand this theorem intuitively.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art part, a kind of Pythagorean theorem demonstration instrument is provided, shrinkage-rule is the slip hypotenuse of drawing square, in teaching process, by changing length and the position of shrinkage-rule, directly read the numeral on two right-angle sides and the shrinkage-rule, in conjunction with formula checking Pythagorean theorem, help the student to understand the key concept of Pythagorean theorem more intuitively, increase the interest of imparting knowledge to students.
Technology solution of the present invention is as follows:
A kind of Pythagorean theorem demonstration instrument, it is characterized in that: comprise drawing square and shrinkage-rule, be respectively arranged with the chute that is parallel to the place right-angle side on two right-angle sides of described drawing square, 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 the rotary telescopic band structure of cylinder, 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; All be carved with scale mark on two right-angle sides of described drawing square, the shrinkage-rule.
" 0 " scale on the 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.
Beneficial effect of the present invention is:
The present invention is simple in structure, shrinkage-rule is the slip hypotenuse, in the field research process, by changing length and the position of shrinkage-rule, directly read the numeral on two right-angle sides and the shrinkage-rule, verify in conjunction with formula, the key concept of showing Pythagorean theorem more intuitively, increase the interest of teaching, make things convenient for operation of teacher, improve efficiency of teaching.
Description of drawings:
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is structural representation of the present invention;
Fig. 2 is front view of the present invention.
Embodiment:
The following stated is preferred embodiment of the present invention only, is not that scope of the present invention is limited.
With reference to attached Fig. 1 and 2, a kind of Pythagorean theorem demonstration instrument, comprise drawing square 1 and shrinkage-rule 2, all be carved with scale mark on two right-angle sides of described drawing square 1, the 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 the chute 11; The movable end 22 of described shrinkage-rule is the rotary telescopic band structure of cylinder, 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 length and the position 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 the 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 the key concept of Pythagorean theorem intuitively, improve efficiency of teaching.
Claims (2)
1. Pythagorean theorem demonstration instrument, it is characterized in that: comprise drawing square (1) and 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 described drawing square (1), 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 the rotary telescopic band structure of cylinder, 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 according to claim 1 is characterized in that: " 0 " scale on the 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 |
|---|---|---|---|
| CN 201310221951 CN103280139A (en) | 2013-06-05 | 2013-06-05 | Instrument for demonstrating Pythagorean theorem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310221951 CN103280139A (en) | 2013-06-05 | 2013-06-05 | Instrument for demonstrating Pythagorean theorem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103280139A true CN103280139A (en) | 2013-09-04 |
Family
ID=49062639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310221951 Withdrawn CN103280139A (en) | 2013-06-05 | 2013-06-05 | Instrument for demonstrating Pythagorean theorem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103280139A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108109484A (en) * | 2017-12-27 | 2018-06-01 | 张凤菊 | A kind of Pythagorean theorem apparatus for demonstrating that can be adjusted in right amount |
| CN108562273A (en) * | 2018-06-11 | 2018-09-21 | 珠海格力智能装备有限公司 | Visual detection equipment |
| CN109559602A (en) * | 2019-01-30 | 2019-04-02 | 黄淮学院 | A kind of mathematics teaching aid for mathematical thinking training |
-
2013
- 2013-06-05 CN CN 201310221951 patent/CN103280139A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108109484A (en) * | 2017-12-27 | 2018-06-01 | 张凤菊 | A kind of Pythagorean theorem apparatus for demonstrating that can be adjusted in right amount |
| CN108562273A (en) * | 2018-06-11 | 2018-09-21 | 珠海格力智能装备有限公司 | Visual detection equipment |
| CN108562273B (en) * | 2018-06-11 | 2024-01-30 | 珠海格力智能装备有限公司 | Visual inspection apparatus |
| CN109559602A (en) * | 2019-01-30 | 2019-04-02 | 黄淮学院 | A kind of mathematics teaching aid for mathematical thinking training |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20130904 |