# Interactive Mathematics

## Math Lessons

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### Explore math

Use interactive apps to explore math and get a better understanding of what it all means. Go ahead - play and learn!

There's over 300 easy to understand math lessons.

### What users say...

- I have revised Fourier series from here and all my doubts were clear (
*Jayesh*) - The interactive graphs make the concepts accessible to my students. (
*April*) - After going through "intmath", I am able to derive calculus formulas by myself. (
*Sunil*)

### Latest articles

#### Spiral around a hyperboloid - the Effekt bridge

#### Infinite series background

Infinite series have played an important role in the development of mathematics, especially calculus. Here's some background to some applets I wrote recently... more »

#### The object with finite volume but infinite surface area

This object has a weird property - it has finite volume, but infinite surface area. How is this possible?.. more »

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