## Tangents and the Pythagorean Theorem

A common exercise that’s used to reinforce the concept that the tangent of a circle is perpendicular to its radius involves finding the radius of a circle...

## Spelling and Math

Last night, as part of our learning-play, I asked my five-year-old son how to spell “night”. He told me “nitk”. That got me thinking abo...

The lesser known of two math memes currently wandering around the Internet involves an interesting equation: $\sqrt{2\frac{2}{3}} = 2\sqrt{\frac{2}{3}}$ This ...

## Introducing the Spry

Some time ago, the discussion on π being the incorrect number for calculations in trigonometry, in favor of τ (2π), led me to muse about creating a unit to repl...

## Polygon Sets: Doing the Math

In my previous post, I created sets of regular polygons in GeoGebra by setting a parameter of the polygons equal to a constant. In this post, I will show the ma...

## Polygon Sets

I recently found myself creating a set of regular polygons for a worksheet. I used GeoGebra to create them, and then free-handed the zoom in order to get them c...