On this page we list all of our articles about geometry, pythagoras and the pythagorean theorem.

- The Pythagorean trigonometric identity – sin^2(x) + cos^2(x) = 1
- Proof Pythagorean theorem
- Area of a right triangle
- Everything about pythagoras and the pythagorean theorem.
- Pythagorean triples

In this section you will find related webpages about pythagoras, math and calculations.

- Geogebra – Visualize math online. Draw triangles and other geometrical shapes.
- Countcalculate and kalkylera mera – Very useful calculators and tests. Exists in english, french, swedish, spanish and german.
- Numberphile – Interesting youtube channel about math and special numbers.
- Jsxgraph – Very useful javascript library to visualize math. You need to know javascript and some html.