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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 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

Method used

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  • Multifunctional quadrilateral transformation device
  • Multifunctional quadrilateral transformation device
  • Multifunctional quadrilateral transformation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, two first and second wooden strips (3, 1) are trimmed and planed, and holes C, hole D, hole G, and first hole O are opened in the second wooden strip (1). Open hole A, hole B, hole E, hole F, second hole O at the first wooden bar (3). Use the first elastic (2) to pass through hole D and hole A; the second elastic (4) to pass through hole A and hole C; the third elastic (5) to pass through hole C and hole B; the fourth elastic (6) Through holes B and D, use bolts to pass through the first hole O and the second hole O and install bolts and nuts (7). ), can form a square such as image 3 shown; it can be formed into a parallelogram as shown in 4; the elastic can be pressed Figure 7 , Figure 8 Go through different holes to get different quads. The first elastic band (2), the second elastic band (4), the third elastic band (5) and the fourth elastic band (6) of the elastic bands can be connected to be the same elastic band. When the device is not in use,...

Embodiment 2

[0020] 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 making is to determine which quadrilateral this quadrilateral belongs to according to the intersection position of the diagonals of the quadrilateral and the positional relationship and quantitative relationship of the two diagonals. The material used and making are to drill a hole O at the midpoint hole O place of the first and second wooden strips (3, 1) with two equal-length first and second wooden strips (3, 1) respectively, and use a Bolts pass through these two holes O, the first and second wooden bars (3, 1) are connected together (can be rotated), then decide four holes A on both sides of the midpoint hole O of the second wooden bar (1) , hole B, hole E, hole F, make OA=OB=1 / 2AB, OE=OF≠1 / 2AB; Determine two holes C, hole D on both sides of the ...

Embodiment 3

[0021] Embodiment 3, this device is based on the intersection position of the diagonals of the quadrilateral and the positional relationship and quantitative relationship of the two diagonals, and helps intuitively understand the common points and different points of the diagonals of the parallelogram and various special parallelograms ,Such as Figure 7 shown. Specifically illustrate below, its first bar (3), the second bar (1) are hinged by bolt nut (7), the first elastic (2), the second elastic (4), the third elastic (5) ), the fourth elastic band (6) forms different quadrilaterals when passing through hole A, hole B, hole C, hole D, hole E, and hole F respectively.

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

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

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

[0025] 4. OA=OB, OC=OD, when AB=CD, quadrilateral ACBD is a recta...

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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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