# Archive for September, 2011

## IntMath Newsletter: Length of a curve, resources, 1000 posts

In this Newsletter:

1. Length of an Archimedean Spiral

2. 1000 blog posts. What's next?

3. Resources

4. Poll results

5. Puzzle

6. Friday math movies

7. Final thought: Secret of getting ahead

## IntMath Newsletter: Golden spiral, $0 math e-books, CDF format

In this Newsletter:

1. Golden Spiral

2. Math e-Books for $0

3. 13 yr-old designs efficient solar collectors using Fibonacci and trees

4. Wolfram's new Computable Document Format

5. Math Puzzle: Solution and new one

6. Friday math movies

7. Final thought: Powerful weapon

## Golden Spiral

## Full archive

See the blog sitemap for all previous articles.