Like alphabet geography, but geometry.
I'll begin.
Area = the square of 8/9 of the diameter
Binormal Vector
Cardioid
Differential
Euclidean geometry
Fractal
Geometry!
Hemisphere
Icosahedron
Jacobian Matrix
Klein bottle
Limits
Motive
Non-Euclidean
Obtuse-angle
Polyhedron
Quadrilateral
Ramsey theory
Sircle ;D
only joking
Septagon.
Tetrominoes
Undefined slope
Vertical line
Washer
x= [-b +\- sqroot(b^2 - 4ac)]/2a
y = 0;
x = 1;
while(true){
temp = y;
y = x;
x += temp;
draw_line(y,temp,x,y);
}
// edit - that didn't turn out so well...
Zeno's paradox
Aristotle's wheel paradox
Brachistochrone
Circumference
Diameter
Equidistant
Formula
Googolplexagon j/k j/k
Graph
Hypotenuse
Isosceles triangle
Johannes Kepler
Kite
Lune
Mensuration
N-dimensional space
octagon
Opposite over adjacent = tangent (from the Latin tangens, "touching". Because a curve is touched most perfectly only by its tangent line).
Arrrgh, MundaCorMeum beat me to it.
Pyramid, from the Greek pyros, "fire". For of the five elements comprising this world, fire is the one which deals the most pain. And of the five Platonic solids, the tetrahedron, likewise, with its sharp and pointy corners, is the one which hurts the most when you step on it... in bare feet.
Quadrant
Root-2, a.k.a. the Pythagoras constant, i.e. the length of the hypotenuse of the most-perfect isosceles right triangle, whose irrationality is said to have been discovered by one most unfortunate Pythagorean named Hippasus of Metapontum. For this discovery Pythagoras himself perhaps commanded that he should put to death, and so they were left with little choice but to take him out on one of their ships. And he was never heard from again.
Surface
Tangent
Unit circle
Vector
don't know if it counts - Weil (André)
X-axis
y-intercept
Adjacent
Bisector
Circumcenter
damping coefficient
Equiangular Triangle
Frustrum
Glide
Hyperbolic
Inverse Tangent
Julia sets (fractal Geometry)
Koch Snowflake
Line
Möbius Strip
Nonagon
Quote from: Clare on May 13, 2017, 09:15:37 AM
Nonagon
The odd things that come to mind: "I'll knock you upside your nonagan"
Ordinate
Perimeter
Quadrangle
Regular
Scalene trapezoid
Theorem
not sure if I need to specify; i.e., Pappas
I'm starting to scrape the bottom of the memory barrel now :P
Undecahedron
Volume
an easy one to recall that hadn't been used yet.
Weierstrass-Erdman condition
X, in bowling, signifies a strike, and fittingly so, for X is the Roman numeral which means 10, the very quantity of the bowling pins which have been knocked down. And this relates to geometry inasmuch as the bowling pins are configured as a triangle, for the number 10, i.e. the so-called "tetractys" worshipped by Pythagoras, is a triangular number, composed from four and three and two and one.
I I I I
I I I
I I
I
Yen, which in Japanese is not
yen but is rather
en, a common yet also mathematical term which in English means circle. For each yen is worth approximately a penny, and the penny is shaped very much like a circle.
?
Zn = Z(n-1)2 + C
Or, as I'd much rather phrase it,
Zn = ( (Z(n-1)a2 - Z(n-1)b2 + Ca) + (((2 × Z(n-1)a × Z(n-1)b) + Cb) × i ) )
(That way we don't need to work with those so-called "imaginary" numbers...)
I like those last few colorful notations, Daniel.
In terms of number of correct answers so far, aquinas138 is winning I think!
Arcsine, as has been written,
"[. . . ] sine is equal to the opposite over hypotenuse, cosine is equal to the adjacent over the hypotenuses, and the tangent is equal to the sine divided by the cosine, or even the opposite over the adjacent, which brings up the fact of a force called sohcahtoa, which is often confused with Sacagewaea, in which I speeled wrong, which is the lady on those golden dollar coins. Which means that to counteract the forces of Sacagawea, another force must be introduced, one in which is called by Dannyjenn the Susan B. Anthony. Well basically if there's a sohcahtoa, there must be a choshacao, which would stand for cosecant is equal to the hypotenuse over opposite, secant is equal to the hypotenuses divided by adjacent, so then the cotangent must be the adjacent over the opposite, in which this doesn't work out because s can not stand for sine and secant, and c cannot stand for cosine, cosecant, and cotangent. But anyways, if these two sets of formulas are in existence, then one must represent rock, and the other would be paper. This disrupts the flow of rock paper scissors, so a scissors must be introduced. This scissors would most likely be the arcsine, arccosine, and arctangent, which is basically the inverse sine, cosine, and tangent [. . .]" (Book of Lof, ch. XVIII)
Buckiball, a word I sometimes use when referring to the geometry of soccer balls and to truncated icosahedrons in general.
However, I just checked Wikipedia and it turns out that the terms "buckiball" and "truncated icosahedron" are not interchangable; the former is merely another name for the Buckminsterfullerene molecule which takes the shape of the latter. So I guess I will now have to stop calling soccer balls buckiballs :(
Chocolate, a delicious candy of sorts with potentially infinite area. It is said that a single bar can feed an entire army for no less than three hundred years.
https://www.youtube.com/watch?v=BrprduGzo9E
Anyone else playing? lol
Distance = sqrt( (y2-y1)2 + (x2-x1)2 )
Epicycles
Flat as a pancake.
Golden ratio
Hexagon
Isometric
J
A point in the triangle JKL
;D
K, another point on the triangle JKL
L, the last point in the triangle: JKL ;D
Minute (60 minutes in a degree of angle)
Nautilus shell, which, contrary to what they teach in schools, is not a golden spiral.
Origami (in the mathematical sense)
Point, as in the three points in a triangle JKL!!! ::)
Quaternion. No idea what they are, but they seem to be all the rage these days.
Rhombus
Slope
Translation
Ulam spiral
Vonn Miller, of Denver, Colorado
(https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fa.espncdn.com%2Fphoto%2F2016%2F0823%2Fr117996_1600x1000cc.jpg&f=1&nofb=1)