The May 8 problem is one of a few this month involving "petals" created by overlapping arcs of circles.
Try this fun #geometry problem & tell us how you thought about it.
#ProblemSolving #MathEd #MathsEdChat #RecreationalMath #MTBoS #iTeachMath #ClassroomMath
Check out the whole calendar at link above ^^
![The length of the radius of circle O is 4•sqrt2
Four intersecting congruent semicircles form the 4 shaded regions. Find the area inside O and outside all the shaded regions. [The image shows 4 shaded "petals" centered at O and having their tips on the circle]](https://media.mathstodon.xyz/media_attachments/files/114/474/266/411/977/655/original/919e8ce5c48d0d6e.jpeg "The length of the radius of circle O is 4•sqrt2
Four intersecting congruent semicircles form the 4 shaded regions. Find the area inside O and outside all the shaded regions. [The image shows 4 shaded \"petals\" centered at O and having their tips on the circle]")
Shah-i-Zinda, Samarkand, Uzbekistan.
“The Shah-i-Zinda Ensemble includes mausoleums and other ritual buildings of 11th–15th and 19th centuries. ...meaning "The living king" … The Shah-i-Zinda complex was formed over eight (from the 11th until the 19th) centuries and now includes more than twenty buildings.” https://en.wikipedia.org/wiki/Shah-i-Zinda
Following my cherry flower, made using Euclidian constructive geometry, I've now made a wisteria flower.
Learn more about how I've made them here:
https://baillehachepascal.dev/2025/euclide_constructive_geometry.php
Crows can do geometry!
https://www.npr.org/2025/04/12/nx-s1-5359438/a-crows-math-skills-include-geometry
The particular test involved crows identifying a shape that was different from some others -- very reminiscent of the "Which One Doesn't Belong?" book from Talking Math With Your Kids:
https://talkingmathwithkids.com/wodb-about/
(Last time I taught linear algebra, I did an assignment like that -- students had to come up with four matrices, and for each one of them, come up with some linear-algebraic way in which that matrix didn't belong with the other four. It was fun.)
Super long shot but, does anyone would now where to buy for cheap (student prize 
) this book?
#Bookstein F.L., 1991. #Morphometric Tools for #Landmark Data: #Geometry and #Biology
In Abebooks is like 60€ + shipping ...
Would to have it in my collection
#Books #Statitics #HobbieMoney
Hexagonal tiling with stars, squares and assymmetric kites for #TilingTuesday
Floor tiles, Imperial Citadel of Thăng Long, Hanoi, Vietnam
#Tiling #TilingTuesday #Pattern #Geometry #MathArt #MathsArt #photography
This uses rigid rods. Seems obvious in hindsight?
#MathArt #geometry #animation #loop #geogebra #octahedron #cube #3d
This is what I was trying to do originally, I wonder what it would look like if I used rigid rods for the edges.
#MathArt #geometry #animation #loop #geogebra #octahedron #cube #3d
I tried to model these origami as transformation between cube and octahedron in Geogebra, but ended up with this instead
#MathArt #geometry #animation #loop #geogebra #tetrahedron #3d
Two modular origami cubes made from 1:√2 rectangles and squares (Canoe Unit 90° by me).
#origami @origami #MathArt #geometry #cube #ModularOrigami #papercraft #craft
Three modular origami octahedra made from three different kinds of rectangles (Canoe Unit 60° by me).
From left to right, the rectangles are 1:√2, square and 2:√3.
#origami @origami #MathArt #geometry #octahedron #ModularOrigami #papercraft #craft
@mrdk @unnick I'm kind of surprised and not surprised about how the tetrahedron turned out.
#MathArt #geometry #animation #loop #geogebra #tetrahedron #3d
@mrdk @unnick And here’s the rhombic triacontahedron for the dodecahedron/icosahedron (again without scaling the bars to have constant length).
#MathArt #geometry #animation #loop #geogebra #dodecahedron #icosahedron #3d
lls,
