The first of three articles on the History of Trigonometry. This takes us from the Egyptians to early work on trigonometry in China.
The second of three articles on the History of Trigonometry.
This article tells you all about some early ways of measuring as well as methods of measuring tall objects we can still use today. You can even have a go at some yourself!
Mathematics has always been a powerful tool for studying, measuring and calculating the movements of the planets, and this article gives several examples.
Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.
If you would like a new CD you would probably go into a shop and buy one using coins or notes. (You might need to do a bit of saving first!) However, this way of paying for the things you want did. . . .
Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.