# Tangram Table

Use the pieces of the tangram puzzle to make the basic shapes (without overlapping) then complete the table showing which shapes are possible and which are not. Hold down the shift key [or shift] while you drag to rotate the pieces.

Number of pieces:
1 2 3 4 5 6 7
Triangle*

Rectangle*

Trapezium*

Parallelogram*

Pentagon*

Fill in the table then click the button that will appear below.

Check

*For the purposes of this exercise the following definitions apply:

A Triangle is a plane shape with three straight sides

A Rectangle is a four sided shape with opposite sides parallel and all angles the same. A square is also a rectangle.

A Trapezium (or trapezoid) is a four sided shape with one, and only one, pair of opposite sides parallel. more...

A Parallelogram is a four sided shape with opposite sides parallel but adjacent are not equal. A rhombus is also a parallelogram. more...

A Pentagon is a plane shape with five straight sides

As you make each shape you could take a screen grab (use the Snipping Tool in Windows) to keep a record of your findings.

The tangram puzzle is believed to have been invented in China and then brought to Europe by trading ships in the early 19th century. It became very popular in Europe during World War 1 and is now one of the most popular dissection puzzles in the world.

### Similar puzzles for you to try:

#### Tangram Template

Use the pieces of the tangram puzzle to fit into the outlines provided. This is what tangrams were made for.

The short web address is:

Transum.org/go/?to=tangrams

#### Tangram Challenge

A series of tangram challenges in increasing order of difficulty to project on the whiteboard.

The short web address is:

Transum.org/go/?to=tangramchallenge

#### Tangram Christmas Tree

Accurately construct a tangram puzzle then use it to make a Christmas tree and answer a short quiz.

The short web address is:

Transum.org/go/?to=tantree

#### T Puzzle

Use the pieces of the T puzzle to fit into the outlines provided. An easier task than the full tangram.

The short web address is:

Transum.org/go/?to=tpuzzle

There are solutions with diagrams to this puzzle but they are only available to those who have a Transum Subscription.

Henry Ernest Dudeney, Amusements In Mathematics

Friday, March 16, 2018

"The late Mr. Sam Loyd, of New York, who published a small book of very ingenious designs, possessed the manuscripts of the late Mr. Challenor, who made a long and close study of Tangrams. This gentleman, it is said, records that there were originally seven books of Tangrams, compiled in China two thousand years before the Christian era. These books are so rare that, after forty years' residence in the country, he only succeeded in seeing perfect copies of the first and seventh volumes with fragments of the second. Portions of one of the books, printed in gold leaf upon parchment, were found in Peking by an English soldier and sold for three hundred pounds. A few years ago a little book came into my possession, from the library of the late Lewis Carroll, entitled The Fashionable Chinese Puzzle. It contains three hundred and twenty-three Tangram designs, mostly nondescript geometrical figures, to be constructed from the seven pieces."

More Tangram Maths, Transum

Friday, March 16, 2018

"Write down the mathematical shape names for each of the 7 pieces.
Place the pieces in order of size, with the smallest first.
If a tangram puzzle makes an 8cm by 8cm square, what would be the areas of each of the pieces?
What would be the perimeters of each of the pieces?
What are the angles in each of the pieces?"

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