Nine-Point Circle in Small Basic

This post has been republished via RSS; it originally appeared at: Small Basic Blog articles.

I wrote a program to draw a nine-point circle.  The program ID is SJV079-0.  A nine-point circle passes nine significant points defined by a triangle:

  • The midpoint of each side of the triangle
  • The foot of each altitude
  • The midpoint of the line segment from each vertex of the triangle to the orthocenter

Nine-Point Circle v0.2.png

You can drag and drop each vertex of the triangle.

This program still has following issues:

  • sometimes occurs divided by zero error
  • orthocenter sometimes doesn't connected with lines properly

I will update this blog post (or leave comments) if these issues are fixed.  Have fun with nine-point circles!  Thanks. 



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