Conversations

Ryan Hirst, Feb 22, 2014

This Collection is an open invitation to collaborate with you, fellow GGB user. I check mail infrequently. [b] Leave a comment here[/b], a project idea, a request, a challenge.... If I leave a challenge for you, I will always offer at least a partial solution. It is not my goal to stump you or be stumped, but to make better worksheets, and improve GGB. *Link to leave me a comment or challenge: [url]http://www.geogebratube.org/material/show/id/91343[/url]

Table of Contents

  1. Inbox: Challenges
    1. Challenges
  2. Outbox
    1. Incircle! 1 for GoldenJ
    2. Perspective Study
    3. Area Under a Parabola
    4. Trammel of Archimedes
    5. Bezier Paths for Agata
    6. Sticky Menu for Daniel
    7. Constant width for MBorcherds
    8. A circle I once knew

1.

Inbox: Challenges

  • 1. Challenges

1.1.

Challenges

(Leave a commente here: [url]http://www.geogebratube.org/material/show/id/91343[/url])
– Ryan Hirst

2.

Outbox

  • 1. Incircle! 1 for GoldenJ
  • 2. Perspective Study
  • 3. Area Under a Parabola
  • 4. Trammel of Archimedes
  • 5. Bezier Paths for Agata
  • 6. Sticky Menu for Daniel
  • 7. Constant width for MBorcherds
  • 8. A circle I once knew

2.1.

Incircle! 1 for GoldenJ

As an experiment, I shall try to find the Incenter of a circle, a number of different ways. Attempt 1.

Calculus is like a little master key for geometric problems. The update script in t carries out the procedure suggested under "?", with one adjustment: a damping term has been added. Without it, D will orbit a solution indefinitely (try setting k to 0). Note that the condition BD = BF = BG is strict. GGB only stops when it judges the three lengths to be equal. But I haven't proved anything about the incircle! Hum.
– Ryan Hirst

2.2.

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