arctan(1/2) + arctan(1/3) = pi/4 (45 deg): Proof Without Words. Or, in simpler terms, green angle + orange angle = pink angle. 🙂 geogebra.org/m/w8r7rn9Q GeoGebra AMTNYS ATOMICMath #MTBoS #ITeachMath #Math #MathChat #HSMath #Maths #Trig #Trigonometry #geometry #CollegeMath

Medians & Centroid Dance: geogebra.org/m/pwTTqNfh. Although, IMO, this EXP is BEST done hands-on, this GeoGebra resource (with key Qs for Ss) can be used to reinforce what they discover afterwards. #MTBoS #ITeachMath #math #maths #geometry #proof #triangle #MSMath #HSMath

Looking for puzzles? I have lots!Here are 3 ways to find them: A) scroll back through my tweets. B) I collect screenshots here: drive.google.com/file/d/1hVP8tL… C) In actual real life book form amazon.co.uk/dp/1095672460/ (UK) or search in your local amazon site.

ofpad.com/mental-math-cb…

The Viral Equation Breaking The Internet 230 - 220 ÷ 2 = ? I say it is 120 A math PhD says it is 5! Who is right? Video youtu.be/fljbRIyzGms Blog wp.me/p6aMk-8ri #mindyourdecisions #mathematics #math #maths

Throwing an object at the same speed but different angles defines an ellipse via its maximum height

Problem of the week! The solution to the previous one in the comments section below. Can you solve this? #ProblemOfTheWeek #UKMT #UKMathsTrust #LoveMaths #Mathematics

What fraction of the whole square is a single blue square in the second diagram? Third diagram? 100th diagram?

Viviani's Theorem: in an equilateral △, the sum of the distances from any interior point to the 3 sides is equal to the height of the △

The centres of all seven circles are marked. The width of the shaded ring is 1. What’s its area?

I am v happy to share any resources people want, but a lot of them are handwritten... is that ok? E.g.:"Lots of lovely integrals" that I give as a work-at-this-through-the-yr worksheet for Yr 13. E-mail me ([email protected]) if you want detailed worked solutions and answers.

I turn off my computer when #torrents #download ... Thanks Seedr Official! seedr.cc/?r=331103

Nagel Point and Centroid on Adjacent Isosceles Triangles cut-the-knot.org/triangle/NaGOn… #FigureThat #math #geometry

This is great!!! geogebra.org/m/FwsnSVFB