The geometrical form which is daily found to us - a cube or a parallelepiped, is called also rectangular prism which all sides and the parties are parallel. The matchbox, the book, a brick and many other objects can be an example of this figure. Also this figure very often meets in geometrical tasks. Therefore knowledge of an algorithm of creation of a parallelepiped is very important, especially in the course of training at school or higher education institution.
Instruction
1. Before drawing of a parallelepiped it is worth planning on a leaf the place of its arrangement by means of a vising method. Specify the lower and top parties. Determine height of that side which is most closer to you, and note it inside. After that draw lines from the lower and top point. Determine their inclination by arrangement of a figure. If it is at the level of eyes, lines will be horizontal. If there is lower than the level of eyes, lines will aspire up. Respectively, if the figure costs higher than the level of eyes, then lines will be located a corner down.
2. If it is correct to draw a parallelepiped, but not mathematically, then lines will not be ideally parallel. They have to meet in the long term, that is if to prolong lines, they will meet in a certain point. After horizontal lines are put truly, measure their length by a method of vising and draw vertical lines. Thus, the party which is closer to us will be ready. To make sure that construction true, carry out also and the parties invisible to an eye. If everything turns out correctly, then the lower square has to turn out more top.
3. Pi creation of the drawing of a parallelepiped for the first time should recheck correctness of performance of all sides. If you are not familiar with a vising method, use the following hint. Take a pencil and put it on an outstretched arm parallel to eyes. Height has to correspond to width of that box which you copy. That is measure width and look how many times it is located in height. Note also in the drawing. In the same way it is possible to measure compliance and the near parties with distant. When you make sure that all parties are constructed truly, work will be finished. Of course, at the beginning you will need to use a ruler, but further it will be possible to do also without it.