CN201698621U - Regular dodecahedron split - Google Patents

Abstract

The utility model relates to an education teaching tool. A regular dodecahedron split is composed of four splits: the first split is a regular five pyramid of which the bottom side is 1 unit, and the side edge is 1.4 units; the second split is formed by the side contact of two regular five pyramids; and thee third and fourth splits are formed by the side contact of three regular five pyramids. A regular dodecahedron can be split by taking the splits of picture 1 to 4 and picture 3, and a regular dodecahedron can be split by taking picture 1 to 4 and picture 4. Different splitting methods can be formed by different thinking ways, and people can use hands and minds in playing to culture image thinking.

Description

The regular dodecahedron piece

Technical field

The utility model relates to the education and instruction apparatus, in teaching during geometric knowledge, the teacher is gained knowledge having a kind of effective instrument to make the student use institute after school, and use one's hands and brains.By the memory capability of training of students, cultivate thinking in images, excite the potential innovation ability of people.

Background technology

Technology content is on the low side in the present like product, they mainly are fit to the following crowd in child and middle school, and knowledge and technology content are higher and to be fit to great majority adults' like products less, particularly modern people's living standard improves, need carry out amusement on higher knowledge aspect, for adapting to this variation, the regular dodecahedron piece can address this problem, provide a kind of student of making can use the geometric knowledge of learning, the object for appreciation apparatus is pieced together in the space of active again manually brain.

Summary of the invention

As everyone knows, regular polygon has five kinds, and wherein regular dodecahedron has 12 faces, 20 summits, and 30 ribs, its 12 faces all are impartial regular pentagons.In order to solve the apparatus problem that people use one's hands and brains, the utility model provides a kind of regular dodecahedron piece according to regular polygon knowledge, piecing together in the object for appreciation to make people use one's hands and brains, the training memory capability is cultivated thinking in images, makes the brain balanced growth of the people left and right sides to improve intellectual level.

The scheme that the utility model adopted is:

The regular dodecahedron piece is made of four kinds of pieces, and first kind of piece is that bottom side length is 1 unit and incline length is the positive pentagonal pyramid of 1.4 units, with described positive pentagonal pyramid as a base unit; Second kind of piece is by two described positive pentagonal pyramid sides the side to be combined contiguously and formed; The third, the 4th kind of piece be by three described positive pentagonal pyramid sides the side to be combined contiguously and formed.According to regular polygon knowledge, regular dodecahedron can be made up of 12 positive pentagonal pyramids, the high distance that arrives any outside surface in the regular dodecahedron body-centered of described positive pentagonal pyramid, design the bottom side length of positive pentagonal pyramid and the relation between the incline length thus, when getting described positive pentagonal pyramid bottom side length and be 1 unit, it is 1.401 units that incline is about.

The beneficial effects of the utility model are:

Described regular dodecahedron piece is reasonable in design, can make the student utilize institute to gain knowledge and use one's hands and brains, and the different modes of thinking forms multiple different spelling, and it is interesting to piece together object for appreciation.

Description of drawings

Further specify below in conjunction with figure of the present utility model:

Fig. 1 is described positive pentagonal pyramid synoptic diagram, a promptly described base unit;

Fig. 2 is two described positive pentagonal pyramid sides when the side is combined contiguously, the stretch-out view of two bottom surfaces;

Fig. 3 is three described positive pentagonal pyramid sides when the side is combined contiguously, the stretch-out view of three bottom surfaces;

Fig. 4 is three described positive pentagonal pyramid sides when the side is combined contiguously, the stretch-out view of three bottom surfaces;

Fig. 5 is the regular dodecahedron schematic appearance that is combined into.

Among the figure, 1. base, 2. incline, 3. side.

Embodiment

Regular dodecahedron piece as described in constituting as four kinds of pieces of Fig. 1 to Fig. 4 is that base (1) length is 1 unit and incline (2) length is the positive pentagonal pyramid of 1.4 units as Fig. 1, a promptly described base unit, get incline length and be 1.4 units can make piece piece together easily into; As Fig. 2 is when positive pentagonal pyramid side (3) is combined contiguously to the side as described in two, the stretch-out view of two bottom surfaces; As Fig. 3, Fig. 4 is when positive pentagonal pyramid side (3) is combined contiguously to the side as described in three, the stretch-out view of three bottom surfaces.As Fig. 5 is the regular dodecahedron schematic appearance that is combined into.

Embodiment one: get Fig. 1 to Fig. 4 piece, get Fig. 3 piece again, be combined into a regular dodecahedron;

Embodiment two: get Fig. 1 to Fig. 4 piece, get Fig. 4 piece again, be combined into a regular dodecahedron;

Embodiment three: get Fig. 1 to Fig. 4 piece, get three Fig. 1 pieces again, be combined into a regular dodecahedron;

Embodiment four: get Fig. 1 to Fig. 4 piece, get a Fig. 1 and Fig. 2 piece again, be combined into a regular dodecahedron;

Embodiment five: get two Fig. 3 and Fig. 4 piece respectively, be combined into a regular dodecahedron.

Claims (1)

1. regular dodecahedron piece, constitute by four kinds of pieces, it is characterized in that: first kind of piece is that base (1) length is 1 unit and incline (2) length is the positive pentagonal pyramid of 1.4 units, second kind of piece is by two described positive pentagonal pyramid sides (3) side to be combined contiguously and formed, the third, the 4th kind of piece be by three described positive pentagonal pyramid sides (3) side to be combined contiguously and formed.

Images