11:16Impossible Geometry Problems: Trisecting Angle, Doubling Cube, Squaring CircleMath at Andrews University17.4K viewsView & Download
6:19Construction of angle of 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165 and 180 degree newMaths 24 x 7 By R. K. Paliwal Sir4.1M viewsView & Download
2:01A proof to remember: Double Angle Formulas I (visual proof)Mathematical Visual Proofs47.6K viewsView & Download
10:07Constructing double of a given angle using compassMathematics against exploitation683 viewsView & Download