# TANGRAM BOOK PDF

TANGRAMS. RONALD myavr.info Aliar hi tung WMF II i inou radily Men til uiletatud iluu ili in wordt Dui in pet #btitly. Ithu Pociklitirin puzzle in thich mni. Hurtdird. Fig. 2. Fig. An ivory Tangram box and seven puzzle pieces made in China for export. The oldest surviving pair of Chinese Tangram problem and solution books. The invention of the Tangram puzzle is unrecorded in history. The earliest known Chinese book is dated but the puzzle was very old by then. One reason.

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THE TANGRAM is one of the oldest types of dissection puzzles in the world that originated from China. It traditionally requires the participant to arrange seven. Tangram Book, The Anchor Puzzle Book, and the Slocum and Botermans books, and also the. Richter Summary later in these pages. Many versions of the. Tangrams. In old China, the pieces for this game-puzzle were sometimes Here are some tangram challenges. Webster Division, Mcgram - Hill Book Co. N.Y.

Finding popularity with those eager to exercise their brain power in an original way, the puzzles took their place as a prestigiously educational form of entertainment.

So let's explore a whole world of geometry in the very old dissection puzzle called the Tangram. Each player must have his own tangram puzzle.

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The players start the game by selecting a video clip here. Each player tries to build the tangram pattern shown in the video as fast as possible before the timer runs out.

The player who solves the puzzle first wins 1 point and chooses the next video.

## DIY - 3D Tangrams

Whoever solves five tangram patterns 5 points is declared the winner. A man called Tang tried to put seven broken pieces of porcelain together invented Tangram accidentally. Therefore, Tangram is also called the Seven-Board of Cunning. However, from the western point of view, the name Tangram is probably originated from the obsolete English word Trangam, which meant a puzzle in the past.

Although its origin is still rather obscure nowadays, the earliest known publication of Tangram problems can be dated back to at least the very early nineteenth century. When they were on the boats, they liked to play the Tangram puzzle.

## Aunt Annie's Crafts

There was a custom of threading a needle with seven eyes on the seventh day of the seventh month, which was supposed to bring lucky to people. However, the earliest known Chinese Tangram book can be dated back to This book consists of two parts, the problem part and the solution part. A number of figures in the book have the form of Chinese ideograms were reproduced in various puzzle books, without detail explanatory text, but readable and understandable to the Chinese. Some recent literature research has indicated that the Tangram began in the East before the 18th century and then spread to the west later.

It was a popular puzzle in both Europe and America at the beginning of 19th century, and its popularity continues nowadays.

## DIY - 3D Tangrams

A classification of the Chinese Tangram and its applications in teaching According to Elffers , Tangram can be classified as convex Tangram, grid Tangram and connected Tangram. We shall briefly introduce such classification in this section. In addition, we shall discuss the application of angle sum of polygon, solution of indefinite equation and the use of Picks formula.

We hope our discussions will be found useful to mathematics teachers and educators.

For instance, a full moon is convex but a crescent moon is non-convex. A Tangram can be divided into sixteen identical isosceles right-angled triangles, which are called the basic triangles.

If the lengths of the shorter sides of a basic triangle are rational numbers, then the length of the hypotenuse will be an irrational number. Assumed that a convex polygon has n angles, p of these being acute 45o , q obtuse o and r right-angled 90 o , the relationship of p, q, r and n satisfies the following equation. Assumed the area of a basic triangle of the Tangram is 1 square unit.

As the convex polygon has an area of 16 basic triangles, it follows that there are exactly 20 convex polygons that can be formed by 16 basic triangles, but only thirteen polygons of twenty convex polygons constructed by using Tangram. For different numbers of irrational basic triangle side, there are a lot of constructible polygons. Teachers can ask the students to investigate the maximum area of the convex polygons in class.

A grid Tangram is a Tangram in which every vertex of the seven pieces coincides with points of the grid.

It is interesting to find that every grid Tangram can be formed into a convex polygon by adding basic triangles. In order to play the grid Tangrams in class, convexity number is defined as the smallest number of basic triangles required to form a grid Tangram into a convex polygon.

The corresponding convex polygon is defined as the convex hull of the Tangram. The convex Tangrams with convexity number zero are their own convex hull.

The pdf includes several templates which include all the pieces arranged in a two-dimensional format. The puzzle involves turning a flat object the template into a three-dimensional form. Tangram sculpture kits are easy to use. The template is first printed onto cardstock paper to create the set of tans.

The method of construction begins with carefully cutting out the template. The template includes folding lines as well as cutting lines and the folding lines indicate the key to rearranging the flat pieces into a 3D form.

The system involves folding along the lines and gluing the flaps together in a specific sequence that creates the desired shape.It is clear that only one empty basic triangle appears in each of the Tangrams in Figure 5, and it follows that all Tangrams in the figure are of order one. The finished results are attractive and can be displayed or used together to create decorative pieces. It is interesting to find that every grid Tangram can be formed into a convex polygon by adding basic triangles.

So let's explore a whole world of geometry in the very old dissection puzzle called the Tangram. Mix tans from two or more Tangram sets to make puzzles.

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