Ptolemy’s Theorem and the Almagest: we just found the best visual proof in 2000 years Mathologer 32:54 1 month ago 87 007 Далее Скачать
A Miraculous Proof (Ptolemy's Theorem) - Numberphile Numberphile 38:28 4 years ago 1 036 970 Далее Скачать
How to Prove Ptolemy's Theorem for Cyclic Quadrilaterals Mohamed Omar 7:02 4 years ago 16 496 Далее Скачать
Ptolemy's Theorem in Plane Geometry Proof Dr Bob Maths ( Online Maths Tuition) 5:52 4 years ago 1 881 Далее Скачать
Pythagoras Would Be Proud: High School Students' New Proof of the Pythagorean Theorem [TRIGONOMETRY] polymathematic 13:57 1 year ago 910 661 Далее Скачать
Ptolemy's Theorem: Simple proof using similarity of triangles. Prime Maths 3:38 4 years ago 2 729 Далее Скачать
18 year old students just discovered a proof of Pythagoras that mathematicians said was impossible MindYourDecisions 18:07 1 year ago 1 032 992 Далее Скачать