4.5 (366) · € 22.50 · Auf Lager
Modern triangle geometry - Wikipedia
Desargues's theorem - Wikipedia
Trigonometric functions - Wikipedia
Dividing a line segment by exterior division according to the
File:Golden ratio - Pentagram.svg - Wikimedia Commons
Right angle - Wikipedia
Spieker circle - Wikiwand
File:Golden triangle and Fibonacci spiral.svg - Wikipedia
Golden triangle (mathematics) - Wikipedia
Triangle - Wikipedia