4.7 (289) · $ 14.00 · In stock
Angle trisection is the division of an arbitrary angle into three equal angles. It was one of the three geometric problems of antiquity for which solutions using only compass and straightedge were sought. The problem was algebraically proved impossible by Wantzel (1836). Although trisection is not possible for a general angle using a Greek construction, there are some specific angles, such as pi/2 and pi radians (90 degrees and 180 degrees, respectively), which can be trisected. Furthermore
Trisection of angles-similarly
Is it possible to draw a triquetra using the golden ratio? - Quora
Trisecting an Angle Using a Conchoid - Wolfram Demonstrations Project
Tomahawk Trisection of an Angle - Wolfram Demonstrations Project
PDF) A Classical Proof on the Constructability of Geometric Magnitudes: In the Case of Angles (Reconsidering the Angle Trisection Problem, a Comprehensive Survey)
Trisection of angles-similarly
Angle Bisector -- from Wolfram MathWorld
Steiner Angles -- from Wolfram MathWorld
Trisection of angles-similarly