This is a Wikipedia user page. This is not an encyclopedia article or the talk page for an encyclopedia article. If you find this page on any site other than Wikipedia, you are viewing a mirror site. Be aware that the page may be outdated and that the user whom this page is about may have no personal affiliation with any site other than Wikipedia. The original page is located at https://en.wikipedia.org/wiki/User:Petrus3743. |
at This user is able to contribute with a native level of Austrian German |
Dear friends of Wikipedia,
something about me:
later through self-taught studies
- Born in 1943
- Austrian
- Since 1963 in Munich
- At work, I was first a motor mechanic, later through self-taught studies a state-certified technician and ultimately technologist for new manufacturings engineering at a major car manufacturer in Bavaria.
- In February 2012, I started with small contributions, often with the kind support of helpful colleagues. With fondness I create geometric drawings in GeoGebra for example polygons as Compass-and-straightedge construction and approximations with minimum deviations from the nominal value.
On a continued good work for Wikipedia!
My contributions are included in ...
edit- Square at a given side length and Square at a given diagonal (animations)
- Pentagon at a given side length and Euclid's method for pentagon at a given circle, using of the golden triangle, animation
- Hexagon at a given side length
- Heptagon, one animation shows a neusis construction by means of the tomahawk
- Heptagon, another animation shows a neusis construction by means of the marked ruler.
- Octagon at a given side length, animation
- Nonagon, Another two animations of an approximate construction
- Decagon at a given circumcircle and decagon at a given side length as animations, the golden ratio in decagon
- Hendecagon according to T. Drummond from 1800, approximation construction as an animation
- Dodecagon at a given side length, animations
- Tetradecagon, an animation from a neusis construction based on the angle trisection by means of the Tomahawk
- Tetradecagon with given side length, an animation from a neusis construction with marked ruler, according to David Johnson Leisk
- Pentadecagon, construction at a given circumcircle, construction at a given side length
- Hexadecagon, construction at a given side length
- Heptadecagon, construction according H. W. Richmond
- Heptadecagon according to Duane W. DeTemple with Carlyle Circles, animation
- Heptadecagon according to "sent by T. P. Stowell, credited to Leybourn's Math. Repository, 1818". and animation
- An animation of a neusis construction of a heptagon, based on Andrew M. Gleason, using angle trisection by means of the tomahawk
- Octadecagon, an animation of an approximate construction
- Octadecagon, an exact construction based on the angle trisection 120° by means of the tomahawk, animation
- Icosagon, the golden ratio in icosagon
- Squaring the circle, Construction by Jacob de Gelder
- Squaring the circle, Construction by Hobson
- Squaring the circle, Constructions by Ramanujan 1913
- Squaring the circle, Constructions by Ramanujan 1914, with continuation of the construction (dashed lines, mean proportional red line), animation
- Squaring the circle, Construction using the golden ratio
- Perpendicular, Construction of the perpendicular, Thales' theorem used, animation
- Right angle, Thales theorem, An application example in which the right angle and the Thales' theorem are included (see animation)
- Napolian's problem, A variation for a given distance respectively for a given segment
- Angle trisection with an auxiliary curve
- Geometric mean, image for the initiation
- Angle trisection with a right triangular ruler, trisection of the angle by means of the Rechtwinkelhaken according to Ludwig Bieberbach
- Bicentric quadrilateral, construction