# Welcome to Planet Infinity KHMS

## 07 July, 2007

### Another Tangram Idea

This project is contributed by Mansi Jain X B.
Introduction
Tangram consists of 7 pieces, called tans, which fit together to form a shape of some sort. The objective is to form a specific shape with seven pieces. The shape has to contain all the pieces, which may not overlap.

History
The tangram very possibly originated from the furniture set during the Song Dynasty. According to historical Chinese records, the furniture set was originally a set of 6 rectangular tables.
Later, an additional triangular table was added to the set, and people can arrange the 7 tables into a big square table. There is some variation to such furniture set during the Ming Dynasty, and later became a set of wooden blocks for playing.
Another legend states that a servant of a Chinese emperor was carrying a ceramic tile, extremely expensive and extremely fragile. The servant tripped, shattering the tile. In a panic, the servant desperately tried to reassemble the tile into a square, but could not. He did realize, however, that many other shapes could be formed from the pieces.
While the tangram is often said to be ancient, its existence in the Western world has been verified no earlier than 1800. Tangrams were brought to America by Chinese and American ships during the first part of the nineteenth century. The earliest example known is made of ivory in a silk box and was given to the son of an American ship owner in 1802.

The word "tangram" is built from TANG + GRAM. The word "Tangram" was first used by Thomas Hill, later President of Harvard, in his book Geometrical Puzzle for the Youth in 1848.
Traditional tangrams were made from stone, bone, clay or other easy to get materials. Nowadays they can be made from plastic, wood or other modern materials.
Aim To make tangram.
Material Required
Cardbaord , Pair of Scissors ,Scale ,Pencil ,Sketch pens
STEP1: Take a cardboard and cut a square out of it of 8inch x8inch.

STEP 2: Now make a grid on the square obtain from step1 of 2inch x2inch .

STEP3: Then mark the blue lines as shown in the picture given below.

STEP4:Cut down the pieces carefully along these blue lines as shown below.

We can compute the area of each geometrical shape by counting the number of complete squares and half squares. This way we can verify more geometrical shapes related results.

STEP5:This will produce the seven tan pieces-five triangles, one square and one rhombus.

STEP6: The tans are ready to play. Now, decorate it as you want.
This is the reverse side of the khadi paper which I took.

Precautions
1.The wider the cuts ,the more the pieces lose along one or more sides, making the piece not quite true . A knife or thin saw blade would work just fine for this purpose but use it with care.
2.The grid should be make with proper measurement .

My creation :
A ZOO

It is a very creative project done by Mansi XB. Good work!

#### 1 comment:

Ishita said...

GREAT WORK!! love the post!
PS: AND the Blog! great going teacher! keep blogging!