### The size of the Solar System (and more)

I’ve been looking up at the sky at night recently, and thinking about the sizes of things. Now it’s all…

Skip to content
# Numbers and Shapes

#
Category: Visualization

### The size of the Solar System (and more)

### Neusis constructions (4): the Delian problem

### Neusis constructions (3): the regular heptagon

### “Neusis” constructions (1)

### Solving a cubic by folding

### MISG day 5

### MISG day 3

### Two results about squares

### LaTeX multido

### Solving quadratic equations geometrically

Various things, mostly mathematical

I’ve been looking up at the sky at night recently, and thinking about the sizes of things. Now it’s all…

The Delian problem is that of constructing ; since the polynomial equation is irreducible over the equation can’t be solved…

The regular heptagon (seven sided polygon) is the smallest polygon which can't be constructed used Euclidean compass and straight-edge. However,…

As you know, the geometry of the ancient Greeks, as exemplified by Euclid, restricted constructions to the use of unmarked…

Currently I’m reviewing “Origami5” for the Australian Mathematical Society. It’s a terrific volume, filled with nice papers about Origami as…

I didn’t explain the problem well enough in my last post: AGL, the energy supply company, are trying (among other things) to…

This week I’m at the Mathematics and Statistics Industry Study Group, a yearly event where companies from Australia and New…

I’m very fond of geometric results which are a bit surprising, but turn out to be easy to prove. Here…

The LaTeX multido files provide a way for providing general loop macros in LaTeX. They can be used within pstricks,…

I vaguely recall some years ago having seen a nonogram for solving quadratic equations, and I thought it may be…