(Mathhombre) Miscellanea

Math Eggs

Inspired by some Easter math connections people posted, especially this nice egg tangram from Curiosa Mathematica, and those fantastic Pysanka eggs.

I got wondering about how you would model egg shapes.

Here’s three approaches. Which one is the eggiest? Do you have other ideas?

I think this finishes my egg obsession. The sketch is on GeoGebraTube if you want to play.

EDIT: Christian Perfect tweeted along this egg curve corcucopia in response. Check out that gardener’s construction!

EDIT2: added the gardener’s construction

Piaget Gifs!



Imgur sources: A is above, but there are two more: B, C.  Warning: puerile, vulgar and misogynist comments abound on imgur. Be careful what you click and read.
Funny to see these in this format, but it loses none of its potency.
On youtube: all three are from this video on lack of conservation. Obviously better in video! This related video has more of the interviews.

Piaget Gifs!

Imgur sources: A is above, but there are two more: B, C.  Warning: puerile, vulgar and misogynist comments abound on imgur. Be careful what you click and read.

Funny to see these in this format, but it loses none of its potency.

On youtube: all three are from this video on lack of conservation. Obviously better in video! This related video has more of the interviews.

Pysanka Eggs.

Saw these on imgur of all places. I’m a little loathe to link directly to imgur, because it’s so hard to avoid puerile comments or reactions. So click only if you’re not faint of heart. This link goes directly to the gallery, so pretty safe; the OP has a great narrative of their process. The art form is a traditional Ukranian folk art. Gorgeous.

I seems to be on a bit of an egg kick. The egg tangram got me messing about with egg shapes in GeoGebra. Such a fundamental shape and so hard to describe.

curiosamathematica:

Happy Easter everybody!

I can’t give you chocolate Easter eggs, but here I present you the Magic Egg tangram puzzle. This variation of the traditional tangram consists of 9 pieces cut from an egg-shape, and has a tendency to hatch numerous varieties of birds. Can you make the bird shapes above using all the egg’s puzzle pieces?

Solutions here, but it’s a fun puzzle, so you should make a solid version out of cardboard or wood and give it a try first. There is an app on iTunes as well.

Tinky Teacher.
Ben Orlin writes and draws at one of my favorite blogs, Math with Bad Drawings. Insightful, good math and funny.

Tinky Teacher.

Ben Orlin writes and draws at one of my favorite blogs, Math with Bad Drawings. Insightful, good math and funny.

Folding an ellipse.

Inspired by mathani’s nice gif this morning, I had to try in GeoGebra. Pretty happy with the result, and the marking button was a good thing to figure out, I think. It’s on GeoGebraTube for you to play with.

mathani:

Get you best paper, cut a circle and fold it, fold it so that the circumference falls on a fixed point inside. Repeat, using random folds. Now see the creases. This is how you paper-fold an ellipse.

I’ve got the folding circle part in GGB, but hard to capture the idea of marking the folds. Any ideas?

mathani:

Get you best paper, cut a circle and fold it, fold it so that the circumference falls on a fixed point inside. Repeat, using random folds. Now see the creases. This is how you paper-fold an ellipse.

I’ve got the folding circle part in GGB, but hard to capture the idea of marking the folds. Any ideas?

Archimedes’ Hourglass.

Made and shared by @RodBogart. Just wonderful.

Ladder of Learning.
Had to make an image for this great quote on learning. Saw it at Made by Jones. I think so much bad education policy comes from mandating that everyone has the ladder that you like best.

Ladder of Learning.

Had to make an image for this great quote on learning. Saw it at Made by Jones. I think so much bad education policy comes from mandating that everyone has the ladder that you like best.

Overheard on the Independent Lens documentary, The Trials of Muhammad Ali.

Overheard on the Independent Lens documentary, The Trials of Muhammad Ali.