# volume

17 08, 2017

## Black holes – Space science – Physics

By |2019-02-20T19:38:04-08:00August 17th, 2017|Physics|Comments Off on Black holes – Space science – Physics

A starry sky with the Milky Way galaxy (thanks to Bernd Nies) - there are probably black holes in there somewhere! What is a black hole? A black hole is [...]

29 07, 2017

## Area of a sphere – Volume of a sphere

By |2017-07-29T13:10:50-07:00July 29th, 2017|Math|Comments Off on Area of a sphere – Volume of a sphere

This is a sphere. A sphere is a three-dimensional circle. Or you could say that a sphere is the set of all the points that are at the same distance from the center [...]

29 07, 2017

## What is a pyramid? Square pyramids

By |2017-07-29T11:57:36-07:00July 29th, 2017|Math|Comments Off on 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 [...]

29 07, 2017

## What is a prism? Rectangular and triangular prisms

By |2017-07-29T11:53:44-07:00July 29th, 2017|Math|Comments Off on What is a prism? Rectangular and triangular prisms

This is a triangular prism A prism is the solid shape you get if you move a flat polygon through space. A prism has five planes: a top, a bottom, and [...]

29 07, 2017

## What is a cylinder? Simple geometry

By |2017-07-29T09:33:37-07:00July 29th, 2017|Math|Comments Off on What is a cylinder? Simple geometry

This is a cylinder. What can you find around your house that's a cylinder? A cylinder is a circle moved through space to make a solid form. The ends are circles that [...]

29 07, 2017

## Volume of a cone – Geometry

By |2017-07-29T09:28:52-07:00July 29th, 2017|Math|Comments Off on Volume of a cone – Geometry

How much ice cream fits inside this cone? A cone is the set of all the line segments that start from one circle and go to a point not on the circle. You could think of [...]

7 06, 2017

## Math and Numbers in Ancient China

By |2019-10-15T09:08:44-07:00June 7th, 2017|China, Science|Comments Off on Math and Numbers in Ancient China

Chinese numbers: number rods Chinese numbers People in China were using written numbers by about 1500 BC, in the Shang Dynasty. This is about two thousand years later than people began [...]

7 06, 2017

## What are the Nine Chapters? Math in Ancient China

By |2018-04-18T17:47:38-07:00June 7th, 2017|China, Science|Comments Off on 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 [...]

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