“BOOM” — CENTER

Categories Good recommendations
For a couple of minutes of paper or paperboard will be able to make strenuously device that will instantly show you the centre of any circle, for example, the base of the cylinder. The secret lies in the fact that the rays arrows, encircling a circle located at an angle of 90° to each other, and a “shaft” of the arrow divides this angle in half, and it always passes through the center.

Recommend to read

  • AICHI D3AAICHI D3A
    The first Japanese aircraft attacked on 7 December 1941 the American naval base at pearl Harbor and dropped bombs on it, was a compact carrier-based bomber, AICHI D3A. My first flight...
  • GARDEN PATHSGARDEN PATHS
    Garden paths at the cottage or the mansion was just as necessary and sidewalks in the city. As a rule, these tracks build from individual concrete slabs with sizes of 400x400 mm and...