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Mathematics Facts

Eratosthenes Measured Earth’s Circumference—Centuries Before Columbus Sailed

Eratosthenes (c. 276 – 194 BC) was born more than 2200 years ago in the Greek city of Cyrene, now a city in the North African country of Libya. (The Greek Empire surrounded much of the Mediterranean ... Continue reading

What Are Cubes And Cube Roots?

The mathematical term 'cube' comes from the three-dimensional shape of the same name. A cube shape has three dimensions of length, width, and height, all equal and at angles of 90 to each other. Put ... Continue reading

Unit Of Luminous Intensity (candela)

Originally, each country had its own, and rather poorly reproducible, unit of luminous intensity; it was necessary to wait until 1909 to see a beginning of unification on the international level, when ... Continue reading

Mobius Strip

A Mobius Strip is an amusing three-dimensional object whose surface has only one side. Huh? Well, most objects you can imagine have a surface with two sides. For example, an ordinary piece of paper ... Continue reading

Mobius Strip - Do it yourself