Who were the Moche? South American history
Moche portrait of a blind man, 400-500 AD (thanks to Oberlin College) When did the Moche get started? The collapse of the Chavin state in Peru, about 250 BC, seems to have opened [...]
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09, 2017
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07, 2017
What is a pyramid? Square pyramids
A pyramid with a square base. A pyramid is a three-dimensional solid form made out of triangles. Some pyramids also use a square. There are two common kinds of pyramids: triangular pyramids that you [...]
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07, 2017
What is a plane? Simple geometry
A plane goes on infinitely in all directions. Just as a line is made of an infinite number of points, a plane is made of an infinite number of lines that are right [...]
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07, 2017
Geometry made easy!
Geometry: This is an equilateral trangle. What is geometry? The simplest geometric idea is the point, and then the line, the plane, and the solid. Shapes like circles, squares, rectangles, and triangles are flat, and we can think of [...]
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06, 2017
How to build a pyramid – Ancient Egypt
Pyramid project: building a sand pyramid A pyramid project Ancient Egyptian pharaohs, like Mayan lords, built pyramids because they're a pretty easy shape to build. Pyramids are especially easy to [...]
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06, 2017
What are the Nine Chapters? Math in Ancient China
Nine Chapters: How to figure out the area of an isosceles triangle. A math textbook from Han Dynasty China The earliest Chinese mathematical textbook is called the Nine Chapters. It [...]
