What's this? It looks like a design made out of triangles. Well, it is---but it's also something that you can make into something else! Trace the design on a piece of paper and then cut it out. If...
The Roads of Math
Take a line, a straight line, And divide it into three. Make the three lines form three angles, And a triangle have we. Now take this little triangle And twirl it about in space. Twirl the...
The circle of stones
> Stonehenge, a large circle of tall stones, was made by ancient people > of England. About four thousand years ago, a group of men gathered together on a broad, green plain in what is now southern...
A thousand and one hexagons
Have you ever looked into a kaleidoscope (kuh duh skohp) ? A kaleidoscope is a toy that makes beautiful designs---thousands and thousands of different designs. You can make a kaleidoscope for...
Snowflakes and honeybees
Snowflakes are a beautiful sight as they come out of the sky on a gray winter clay. But they are even more beautiful when you see them close up through a microscope. Then they look like the work of...
The secret shape
together flat shapes, such as squares and triangles. One shape they made was a fivesided pyramid made of five same-sized equilateral triangles. The bottom of such a shape is a pentagon! To get their...
The special triangle
Thousands of years ago, in ancient Egypt, there were men known as "rope-stretchers." It was their job to mark out the boundaries of fields and the foundations for houses, temples, and palaces. The...
A square puzzle
Long ago, there was a farmer whose land was in the shape of a square. Each side of the square was exactly one hundred paces long. One day, a tired, dusty man knocked on the farmer's door and asked...
Counting triangles
The design shown above is made entirely of triangles. How many triangles, of all sizes, do you think there are? Altogether, there are 88 triangles! See if you can find them all. There are 42...
Triangle tricks
Triangles are tricky shapes. You can do some surprising things with them. Let's make a triangle that you can do some tricks with. You'll need a piece of paper about the size of this book, and a...
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