Geometric proof of Heron's Formula.[br][br][br]NOTE: Help me make this worksheet better -- leave a comment.[br] I think this proof is tough. Do you? What's confusing? Without your feedback, I don't know how to make it better.

More information:[br][b]The inscribed circle:[/b] [url]http://www.geogebratube.org/material/show/id/30923[/url][br][b]Quadrilateral inscribed in a circle: [/b][url]http://www.geogebratube.org/material/show/id/29655[/url][br][b]ρ² = (a1)x[/b]: [url]http://www.geogebratube.org/material/show/id/31122[/url][br][br][br]________[br]Used In Malfatti's Problem:[br][br]1. The constraints: [url]http://www.geogebratube.org/material/show/id/32079[/url][br]2. Solution: [url]http://www.geogebratube.org/material/show/id/32233[/url]