Math

A Curious And Fascinating Geometry Problem

This curious fact was only published in 2011, which is amazing because geometry has been studied for thousands of years. How could such a simple fact go unnoticed for so long?! What is the area of the two semicircles if the circle has an area equal to 1? Special thanks this month to: Michael Anvari, Kyle, Mike Robertson. Thanks to all supporters on Patreon! http://www.patreon.com/mindyourdecisions

Jobbings, A. (2011). The Mathematical Gazette
https://www.cambridge.org/core/journals/mathematical-gazette/article/9564-two-semicircles-fill-half-a-circle/6365F0D492DF2E682E71A891C782CAF6

The chalice problem

Azimuth Project (John Carlos Baez)
Geometry Puzzles

Folding proof by Greg Egan
http://math.ucr.edu/home/baez/mathematical/semicircle_puzzle_egan.gif

Cut The Knot
https://www.cut-the-knot.org/proofs/Semicircles.shtml

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