Cinderella Blog - Triangles

SchwerpunktVektoriell.cdy

anonymous@cinderella.de (Anonymous Cinderella Submission) — Wed, 13 May 2009 16:02:53 +0200

Bitte schalten Sie Java ein, um eine Cinderella-Konstruktion zu sehen.

Triangle Centers: The Apollonius Point.cdy

anonymous@cinderella.de (Anonymous Cinderella Submission) — Tue, 20 Jan 2009 16:06:38 +0100

Please enable Java for an interactive construction (with Cinderella).
Construction of the Apollonius Point. See http://faculty.evansville.edu/ck6/tcenters/recent/apollon.html
for the definition, and http://whistleralley.com/tangents/tangents.htm and
http://whistleralley.com/inversion/inversion.htm for the methods of construction.

The triangle is defined by free points A, B, and C. Construction of the three excircles
Ea, Eb, and Ec was pretty simple given the angle-bisection tool. Construction of the
circle E tangent to Ea, Eb, and Ec and encompassing them was not so simple.
Cinderella's tool for inversions (mirroring defined by a circle) was invaluable in this
complicated construction. No CindyScript was used.

This construction: Just for fun. (To see how it was done, download the construction.
Use the bookmarklet you can find at the Cinderella Support Forum, topic
"Learning from blog posts".)

For more information on different triangle centers, see
http://faculty.evansville.edu/ck6/tcenters/index.html.

-- David Bakin

Thales

anonymous@cinderella.de (Anonymous Cinderella Submission) — Tue, 06 Mar 2007 19:21:33 +0100

Bitte schalten Sie Java ein, um eine Cinderella-Konstruktion zu sehen.
Ein rechtwinkliges Dreieck

Rechtwinkling, Gleichschenklig, Gleichseitig, Beliebig

anonymous@cinderella.de (Anonymous Cinderella Submission) — Thu, 01 Mar 2007 13:03:14 +0100

Please enable Java for an interactive construction (with Cinderella).
Klicken Sie auf die SchaltflŠchen!