Tangram
The tangram is a puzzle consisting of seven flat shapes, called tans, which are put together to form shapes. The objective of the puzzle is to form a specific shape using all seven pieces. People believe it was invented in China during the Song Dynasty,[1] and then brought to Europe in the early 19th century.
Number of configurations
Over 6500 different tangram problems have been created from 19th century texts.
Pieces
There are seven peices called Tans:
- 5 triangles , two built with the main diagonal of the same size, the two small ones of the central strip are also of the same size.
- 1 square
- 1 parallelogram or rhomboid
Tangram Media
Like most modern sets, this wooden tangram is stored in the square configuration.
Explanation of the two-monks paradox:In figure 1, side lengths are labelled assuming the square has unit sides.In figure 2, overlaying the bodies shows that footless body is larger by the foot's area. The change in area is often unnoticed as √2 is close to 1.5.
Two monks tangram paradox
The Magic Dice Cup tangram paradox
Clipped square tangram parado by sam Loyd
The 13 convex shapes matched with tangram set
References
- ↑ Shi, Jiannong (2004). Robert J. Sternberg (ed.). International Handbook of Intelligence. Cambridge University Press. pp. 330-331. ISBN 978-0-521-00402-2.
