New Geometry product on horizon from Singing Turtle Press. Math author Josh Rappaport is coming out with an eBook on geometry. Read this post to find out more!

# Archive | Formulas

# Invisible Misunderstandings: Square roots of 2 and 3

There are large chunks of mathematical knowledge that we often assume students have down. In fact, they often lack that knowledge. A good example is this: most students I work with have virtually no sense as to the value of the square root of 2 or the square root of 3. This post offers a few suggestions on how to help students in this regard.

# Origins of the Coordinate Plane

One of the legends of math relates to the invention of the coordinate plane system. The legend states that Descartes was inspired to invent this system after watching a fly move around on the ceiling over his bed. This post tells the story and points out its relevance for modern math teachers.

# Answer, Fun Math Problem

Here is the answer to an interesting problem: what provides a better fit, a square peg in a circular hole, or a circular peg in a square hole? We can use simple geometry to figure it out!

# FUN MATH PROBLEM — Circling the Square & Vice-Versa

Circle the Square or square the circle. Either way, it’s a fun math problem. Feel free to try it, share it, use it however you wish.

# Answer to Problem of the Week – 10/18/2010

Answer to Problem of the Week, regarding travel of a pair across the American Southwest.

# Problem of the Week – 10/18/2010

Problem of the Week on how to find distance from one point to another, for two people on a sightseeing trip through the western United States.

# ANSWER TO FRIDAY’S PROBLEM:

Answer to Friday’s problem, regarding the number of diagonals that can be drawn in any convex polygon.