Useful Links

• Triangle Area, base + height.
  Animation by Adam Thomas

• Triangle Area. Animation by Gautham Dayal.

• Euclid's Proof of the Pythagorean Theorem by Scott Farrar.

• List of Pythagorean Triples

• Generate Heronian Triangles; see output

• Vieta's Formulas on AoPS

• Po-Shen Lo's method to solve quadratic equations

• Visualization of AM/GM inequality