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Tangram Paradox

How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!

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Cutting Corners

Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?

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Cut and Make

Cut a square of paper into three pieces as shown. Now,can you use the 3 pieces to make a large triangle, a parallelogram and the square again?

World of Tan 7 - Gat Marn

Age 7 to 11 Challenge Level:
Children you may like to:
  • complete the silhouette of the 'Gat Marn' plaque as last seen;
  • work out the full cost of the plaque, not including green baize, if the cost of the square was 100 US dollars;
  • design a poss ible replacement - but it must have at least one line of symmetry.
Parents you may like to:
  • make a collection of company logos and discuss the shapes that are contained therein;
  • find what countries share a border with China;
  • find out about the currency used in China and those of the neighbouring countries.

Teachers you may like to:
  • develop the ideas of symmetry a little more deeply. Can tangrams be arranged with 1,2 or more lines of symmetry? Can arrangements have rotational symmetry?
  • consider the role of symmetry in the design of goods and materials.
  • explore some of the phrases in italics used in the story and try to replace with alternatives.
  • consider other words that could be used to describe the emotional conditions that Grandma T and Mr. Cheung found themselves in.