https://preview.redd.it/w5z3uculgtxd1.jpg?width=3024&format=pjpg&auto=webp&s=f9682701b7fae28fcb01cf933909470bfef92649

How would I determine the area of the middle shaded section?

I would like some more beautiful (either aesthetically or mathematically) Geometry things to buy. They don't just have to be mathematical diagrams, but something which leads the eye and makes you see the geometry beneath , for instance :

[Kandinsky - a Delicate Tension] (https://www.museothyssen.org/en/collection/artists/kandinsky-wassily/delicate-tension-no-85)

Or Oliver Byrne's Elements of Euclid: The First Six Books with Coloured Diagrams and Symbols (Art Meets Science Edition)

I would love a gomboc, but they are sadly too expensive for my budget. I have no 3d printer.

But what are the actual names of triangles in which one side cubed is equal to the sum of the cubes of the other sides (a³+b³ = c³)? What interesting properties do such triangles have? (besides the fact that at least one side cannot have a integer length)

Can anyone suggest good iphone apps for drawing and labeling triangles? I make notes for my kids – helping with geometry and trigonometry homework – and I want to move from sketching on paper to an app.

Thanks

From Wikipedia: Truchet tiles are square tiles decorated with patterns that are not rotationally symmetric.

Then three examples of patterns are given: Contrasting triangles, Quarter-circles, and Diagonal

But as far as I understand Quarter-circles and Diagonal have 2-fold rotational symmetry, meaning if you rotate the pattern 180 degrees you will get the same pattern.

Can anyone clarify?

Title probably explains itself, I'm trying to rotate object A based on object B's angle (check image), my first idea was to make B work as a plane for A, but can't do that in a program. I don´t really know how to solve these kinds of problems so any insight into trigonometry or related stuff is greatly apreciated.

https://preview.redd.it/lkrsfx55otwd1.png?width=552&format=png&auto=webp&s=02fc22f48fac64092f9f7f9b3fadbf8d35e288c6

Can you help ? https://math.stackexchange.com/questions/4989344/math-problem-geometry

I have a map of house where I have to calculate the area of it but problem is no one side is same in measurement and not even parallel to each other. So how to calculate area searched internet and got s(s-a)(s-b)(s-c) formula but problem is they are having diagonal length which i dont have.

How do you call a line that is a curve in all orthographic views?

I learned about this while watching a tutorial for a nurbs modelling software and I forgot about it.

Thank you!

https://preview.redd.it/lm0shlgh7cwd1.png?width=1013&format=png&auto=webp&s=3019fdcc87c9d81c4f05d62cf6224dcd5e598ba8