Placing the 2 smaller squares on the larger one, we see that the sum of the areas of the corner squares must equal the area of the black central one. We reached a contradiction since we assumed a and b are the smallest integers such that a²=2b²! pic.twitter.com/2xMt3MN2zL

— Fermat's Library (@fermatslibrary) April 15, 2019

The exterior angles of a polygon add up to 360 degrees#mtbos #iteachmath #math #maths #geometry pic.twitter.com/wIDgsiuM0w

— Idan Tal (@MagicPi2) April 14, 2019