@thechalkface.bsky.social
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📥 87
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Exploring Steiner points after seeing
@johnnygriffiths.bsky.social
carom-maths (and the classic video from James Grime
youtu.be/dAyDi1aa40E
). Made it into trig optimisation & a p5js sketch: throw in more points to see if random jitter plus MST (Prim's alg) can replicate it:
youtu.be/dAyDi1aa40E
9 days ago
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Animation showing the key features of a circle. Original code here (allows you to pause by clicking):
editor.p5js.org/thechalkface...
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29 days ago
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Been using AI to learn
@autodeskfusion.bsky.social
so I could design these French cleats to 3D print for invisibly attaching a mantlepiece to the wall. Feels nice and solid, but I can remove it in half a second (you know, for when you take your mantlepiece on holiday...)
about 1 month ago
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Somewhat biased questioning methods here?! And someone at this company (which as far as I can gather is a broker of brokers of insurance companies) will be proudly reporting how many people complimented them (100% of those surveyed!)
about 2 months ago
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It's that time of year again - anyone with students who can do volumes of revolution might like to calculate the volume of a creme egg from my implicit equation:
about 2 months ago
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If we create a distribution from a subset of the normal distribution, we usually lose symmetry. In this one, we can calculate the mean using improper integrals (the centre-of-mass formula turns the Gaussian integral into a simple inspection one), and we get a mean of sqrt(2/pi).
about 2 months ago
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Tip for anyone who uses Eratosthenes sieve with students to filter for primes: with lines of 21, all the early primes make nice lines (3 and 7, the sneakiest ones, are both vertical lines, and the rest are 45 degree diagonals).
2 months ago
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My students wanted to know if they could bring my 'sine ruler' into their A level Maths exam. Not hugely surprised that the answer was 'no', but the reason surprised me! Apparently students aren't even allowed a normal ruler! Is this common knowledge??
4 months ago
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I made a thing!
5 months ago
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Used
@geogebra.org
to create 3D versions of polar curves so I could print them. SOO helpful for teaching integration when you can physically see the overlapping regions and trace the shape with your finger. Increasing theta is in the z direction.
6 months ago
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I love breaking the unspoken rule about fraction diagrams (all pieces congruent, not just equal in area). Here are a few of my favourite non-standard representations. A one radian sector fills half the unit square, the curves y = x² and y = √x enclose 1/3 of the square. Can you come up with more?
7 months ago
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Quite pleased with this little
@geogebra.org
animation of mine - shows how the area of a fixed perimeter rectangle changes as we vary the side length.
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8 months ago
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Rock-Paper-Scissors-Minus-One: what if both players had to reveal what they were about to play in advance? More mathematically interesting than it might sound...
youtu.be/Xv7PnN5vVaU
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Rock Paper Scissors Minus One - optimal strategy for the Decide Or Die variant
YouTube video by Anthony Clohesy
https://youtu.be/Xv7PnN5vVaU
8 months ago
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Using p5js to create an animated version of the 'paceometer' seen in a
@rorysutherland.bsky.social
talk:
youtu.be/Bc9jFbxrkMk
.
editor.p5js.org/thechalkface...
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9 months ago
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Using TinkerCad to design a replacement part for my retractable Stanley knife. At this rate, I only need to break another 40 or 50 household objects and the printer will have paid for itself ;)
10 months ago
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@sparksmaths.bsky.social
Been trying to model your Binomial-not-binomial data with some Terrible Python Code (tm). Any chance I can access your weird data? Simulating different drop-out rates and want to chi-squared against your actual data. I attach a
@geogebra.org
visual to get your attention ;)
11 months ago
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