Pringles
paraboloids, and there are two types: elliptic paraboloids and hyperbolic paraboloids.
The basic ones are: sine, cosine, tangent, cosecant, secant, cotangent; Less common ones are: arcsine, arccosine, arctangent, arccosecant, arcsecant, arccotangent; hyperbolic sine, hyperbolic cosine, hyperbolic tangent, hyperbolic cosecant, hyperbolic secant, hyperbolic cotangent; hyperbolic arcsine, hyperbolic arccosine, hyperbolic arctangent, hyperbolic arccosecant, hyperbolic arcsecant, hyperbolic arccotangent.
An arc-hyperbolic function is an inverse hyperbolic function.
Octagonoctagon
A regular octagon
Mathematicians call them "factor pairs."
Most mathematicians would call that a 1000-gon. If you want to show off, call it a "chiliagon."
Spheres, ellipsoids, paraboloids, hyperboloids, cardoids, smooth blobs.
It works in Euclidean geometry, but not in hyperbolic.
Because as a prime number it is very boring.
Journal of Hyperbolic Differential Equations was created in 2004.
Mathematicians call it a 25 sided polygon or a 25-gon. ICOSITEPENTAGON