GeoGebra Math Apps Posted on 2019/04/19 by Carl Reply #Math Ts: Wish your Ss had a triangular prism they could EXP & modify? If they have a smartphone (#iPhone or #Android) or tablet, they can EXP in #3d #AugmentedReality (as shown here)! 😀 @geogebra resource: https://t.co/31UVYX2URu. #MTBoS #ITeachMath #maths #EdTech #geometry pic.twitter.com/XZkeJJiF26— Tim Brzezinski (@dynamic_math) April 17, 2019 https://www.geogebra.org/

Real and imaginary Posted on 2019/04/17 by Carl Reply “Math quote: The words real and imaginary are picturesque relics of an age when the nature of complex numbers was not properly understood. — H.S.M. Coxeter” Math quote: The words real and imaginary are picturesque relics of an age when the nature of complex numbers was not properly understood. — H.S.M. Coxeter— math prof (@mathematicsprof) April 16, 2019

Kepler triangle Posted on 2019/04/17 by Carl Reply Kepler triangle#mtbos #iteachmath #math #maths #geometry pic.twitter.com/bfbBjrSoty— Idan Tal (@MagicPi2) April 17, 2019

A simple proof that √2 is irrational Posted on 2019/04/15 by Carl Reply 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 Posted on 2019/04/14 by Carl Reply 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

Maths in a minute: The Sydney Opera House Posted on 2019/04/12 by Carl Reply Maths in a minute: The Sydney Opera House

A Proof in the Drawer – with David Eisenbud : Numberphile Posted on 2019/04/11 by Carl Reply A Proof in the Drawer – with David Eisenbud : Numberphile

An analysis of nearly 4 million pitches shows just how many mistakes umpires make Posted on 2019/04/08 by Carl Reply An analysis of nearly 4 million pitches shows just how many mistakes umpires make

Alternative Big O notation Posted on 2019/04/08 by Carl Reply Alternative Big O notation:O(1) = O(yeah)O(log n) = O(nice)O(n) = O(ok)O(n²) = O(my)O(2ⁿ) = O(no)O(n!) = O(mg!)— jwcarroll (@jwcarroll) April 6, 2019