Talk:Trigonometry/Proof: Heron's Formula

What's needed
Needs: JamesCrook (talk) 18:43, 5 November 2010 (UTC)
 * Nicer layout of the maths.
 * Add exercise, it's algebra, working with these very symmetric equations.

Move to for Enthusiasts section?
Is this too hard for the mainstream part of this course? If so move to enthusiasts section.JamesCrook (talk) 18:43, 5 November 2010 (UTC)