Multifunctional quadrilateral transformation device

A deformation device, quadrilateral technology, applied in the field of multi-functional quadrilateral deformation device, can solve the problems of rigid teaching, lack of interest, inspiration and creativity, etc., and achieve the effect of quick mastery of skills, good teaching effect and easy operation

Inactive Publication Date: 2014-05-14
覃海兰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The definition, nature and judgment of quadrilaterals, and the connection and difference between them and parallelograms and prisms are the focus of mathematics teaching in junio

Method used

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  • Multifunctional quadrilateral transformation device
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  • Multifunctional quadrilateral transformation device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] In Embodiment 1, two first and second wooden strips (3, 1) are trimmed and planed, and holes C, D, G, and O are opened in the second wooden strip (1). A hole A, a hole B, a hole E, a hole F, and a second hole O are opened in the first wooden strip (3). Pass the first elastic band (2) through hole D and hole A; second elastic band (4) through hole A and hole C; third elastic band (5) through hole C and hole B; fourth elastic band (6) Go through holes B and D, use bolts to pass through the first hole O and the second hole O to install the bolts and nuts (7), and open the second wooden strip (1) and the first wooden strip (3) during operation. ), can form a square such as image 3 As shown; can be formed into a parallelogram as shown in 4; the elastic band can be pressed Figure 7 , Figure 8 Get different quadrilaterals through different holes. The first elastic band (2), the second elastic band (4), the third elastic band (5), and the fourth elastic band (6) of the elast...

Example Embodiment

[0020] In Embodiment 2, a quadrilateral is a geometric figure that is widely used in people's daily life, especially special quadrilaterals such as parallelograms, rectangles, rhombuses, and squares are more useful. The principle of production is to determine which quadrilateral the quadrilateral belongs to based on the position of the intersection of the diagonals of the quadrilateral and the positional and quantitative relationship between the two diagonals. The materials used and the production is to use two equal lengths of the first and second wooden slats (3, 1), respectively drill a hole O at the midpoint of the first and second wooden slats (3, 1), and use one The bolts pass through these two holes O, connect the first and second wooden strips (3, 1) together (can be rotated), and then fix four holes A on both sides of the midpoint hole O of the second wooden strip (1) , Hole B, Hole E, Hole F, make OA=OB=1 / 2AB, OE=OF≠1 / 2AB; set two holes C and D on both sides of the mi...

Example Embodiment

[0021] Embodiment 3, this device is based on the position of the intersection of the diagonals of the quadrilateral and the positional relationship and quantity relationship of the two diagonals to help intuitively understand the common points and different points of the diagonals of parallelograms and various special parallelograms ,Such as Figure 7 Shown. In the following, the first wooden strip (3) and the second wooden strip (1) are hinged by bolts and nuts (7), and the first rubber band (2), the second rubber band (4), and the third rubber band (5) are hinged. ) And the fourth elastic band (6) respectively pass through the holes A, B, C, D, E, and F to form different quadrilaterals.

[0022] 1. ① When OB≠OE and OC≠OG, the quadrilateral ECBG is a general quadrilateral;

[0023] ② When OE=OF, OC=OD, the quadrilateral ECFD is a general parallelogram;

[0024] ③When OE=OF, OC=OD, EF⊥CD, the quadrilateral ECFD is a rhombus;

[0025] ④ When OA=OB, OC=OD, AB=CD, the quadrilateral ACB...

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Abstract

The invention discloses a multifunctional quadrilateral transformation device. The multifunctional quadrilateral transformation device includes a first wooden bar, a second wooden bar, a first rubber rib, a second rubber rib, a third rubber rib, a fourth rubber rib, bolts and nuts. The multifunctional quadrilateral transformation device is characterized in that one bolt passes through a first hole O and a second hole O; the first rubber rib, the second rubber rib, the third rubber rib and the fourth rubber rib pass through holes of the first wooden bar and the second wooden bar; and the first wooden bar and the second wooden bar can be hinged with each other since the first hole O and the second hole O of the first wooden bar and the second wood wooden bar are provided with the bolt and one nut; and the first wooden bar is rotatingly hinged with the second wooden bar. Different hole pitch being realized, different quadrangles can be obtained; the two wooden bars are just like Transformers; and thus, the multifunctional quadrilateral transformation device can be used in teaching and experiment demonstration. With the multifunctional quadrilateral transformation device adopted, profound principles can be embodied, and teaching tends to arouse students' interests. The multifunctional quadrilateral transformation device is advantageous in interesting property, inspiration, creativity, operational easiness, simple structure and few materials.

Description

technical field [0001] The invention relates to a quadrilateral device, in particular to a multifunctional quadrilateral deforming device. Background technique [0002] The definition, nature and judgment of quadrilaterals, and the connection and difference between them and parallelograms and prisms are the focus of mathematics teaching in junior high schools. Most of the existing quadrilaterals, parallelograms and other quadrilaterals have fixed borders and edges, so teaching is rigid. Lack of fun, inspiration and creativity. Contents of the invention [0003] The object of the present invention is to provide a kind of simple tool, and simple method can reach the form of Transformer-like evolution into various quadrilateral shapes, which has profound meaning, strong inspiration, good interest, flexible and diverse, quick acceptance by students, and strong memory. [0004] The technical solution of the present invention is such, a kind of multifunctional quadrangular defo...

Claims

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Application Information

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IPC IPC(8): G09B23/04
Inventor 覃海兰
Owner 覃海兰
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