Major Arc -- from Wolfram MathWorld

A major arc (right figure) is an arc of a circle having measure greater than or equal to 180 degrees (pi radians).

Aristotle's Wheel Paradox = Two wheels of different radii appear

Mathematics, Free Full-Text

Chord (geometry) - Wikipedia

What is the largest arc in a circle? - Quora

What is the largest arc in a circle? - Quora

Trisection of angles-similarly

PPT - Modern Geometry PowerPoint Presentation, free download - ID

wiskundeleraar

Major Arc

Finding the North Star

Pat'sBlog: 2013