| 摘要 |
he invention relates to an analog square-measuring instrument composed of an ordinary sub-decimeter 1 having measurement subdivisions incised on its ridge whereon a sliding pointer 2 may be drawn either by hand or by any other mechanism to the desired measurement incision, while at the top of same pointer the constant 1,77246364 R is incised. The invention is an instrument enabling any user to measure the side of a square, which side has almost the same area with a given circle of R radius; this leads to the conversion of circles into squares of respective area, and vice versa. |
