The dodecahedron is the regular polyhedron consisting of equal pentagons. Because the dodecahedron has 12 sides, its model can be used with success as the desktop calendar. For this purpose it is only necessary to stick together a dodecahedron from suitable material — and the unusual souvenir is ready. And it is possible to make a dodecahedron just of color paper, it and without calendar will look very effectively.
It is required to you
- - template (development) of a dodecahedron;
- - ruler;
- - scissors or stationery knife;
- - felt-tip pen or marker;
- - glue;
- - paper or cardboard of suitable density;
- - protractor.
Instruction
1. templatedodecahedronPrint on. Cut out a figure from a pattern. Accurately bend places of bends by means of a ruler and consistently stick together. It is necessary to apply glue on "petals" which are fastened with each other, but not on all side of a dodecahedron. That the ready figure looked attractively, slightly press through places of bends the back of a knife, and an error, paint over cuts or scrapes a marker or a felt-tip pen.
2. If you have no printer, make a dodecahedron template independently, by means of a protractor. Begin with creation of the central pentagon. Correctly to construct a pentagon, you remember that the corner between two of its parties makes 108 °.
3. To each party of the turned-out figure add on a pentagon of the same sizes. In total 6 pentagons — a peculiar flower with petals have to turn out. Do the same once again, without forgetting that it is necessary to connect "petals" of two "flowers" on the party.
4. Surely make on the parties small allowances for greasing them glue. Then cut out, bend places of bends and stick together. At will you can wrap up a dodecahedron in color paper, having pasted it on a figure, or to paint a polyhedron.
5. If you wanted to stick together a dodecahedron, and glue near at hand did not appear, make cuts on lines of bends to the middle of a bend against hour or clockwise — as it is the most convenient to you. Then just insert the parties of future dodecahedron on the made an incision sides each other, they will keep rather reliably.
6. One more way to make a dodecahedron is to make its model in the equipment of origami. As the assistant use the video instruction from the Internet. 30 sheets of paper will be required, it will be more beautiful if to use color paper. Take one leaf and put it in half. Then bend leaf halves still in half in reverse sides so that three lines of a bend and a figure in the form of a fan turned out.
7. After that wrap each party at right angle, put the module obliquely. Make the same with other two sheets. These three modules — the first top of a dodecahedron. Make the remained modules of 27 sheets by the principle described above, enclose modules each other. The effective dodecahedron origami will turn out.