Carefully cut a circle from the cardboard using scissors is very difficult. To help in this work can usually tsyrkul fixed in his foot, as shown in the figure, a razor blade.
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ANSWER: X = 3!
Durable wide goats good for working with long logs. How to saw Poleshko, if its length is less than the distance between the supports] it's very simple! Additional pitch — the third leg...
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In homes today, it is used quite a lot of galvanic power sources (batteries). Even the most "long-playing"-of them at the end of life just thrown away, though their metal body remains as...
