Dmcq

Here I just make and upload not very wonderful pictures to try and help out with what I write on en.wikipedia.

You can find my wiki persona there at [User:Dmcq].

My contributions here

• 
  Sprung floor: Basketweave
• 
  Sprung floor: Low profile
• 
  Haga theorem 1
• 
  Construction of cube root of 2 using origami
• 
  Trisecting an angle using origami
• 
  Illustration of Maekawas Theorem number of valley's and folds differs by 2 at a point
• 
  Crease pattern for 25 point sea urchin type solution for Napkin folding problem
• 
  Crease pattern for an example Miura-ori
• 
  Smart waterbomb - circular base and curved folds
• 
  Selfridge-Conway fair division
• 
  stromquist moving-knife procedure
• 
  Math MOS geometry illustration
• 
  Illustrate what the hypotenuse is
• 
  Codomain of a function (updated from Damien Karras)
• 
  Principal value of the arg function
• 
  circle with some values of atan2
• 
  Deriviative of exponential function equals the function
• 
  Euclid bk1 prop5 pons asinorum, greek letters
• 
  Euclid bk1 prop5 pons asinorum, english letters
• 
  Multiplication example 4 bags of three coloured marbles
• 
  Area of field by multiplication
• 
  Multiplication: Two scaled by 3 produces 6
• 
  A proof without words for the pizza theorem
• 
  A proof without words for Nicomachus's theorem
• 
  Area of annulus determined by tangent length
• 
  Basic idea of Mamikon's theorem
• 
  Finding the area of a cycloid using Mamikon's theorem
• 
  Solving polynomials using Lill's method
• 
  Solution of ax²+bx+c using Lill's method. Solutions are −AX1/SA, −AX2/SA
• 
  Antiparallelogram linkage with bracing to not turn into a parallelogram
• 
  Sylvester's Link Fan or Isoklinstat to trisect angles
• 
  Spherical coordinate system with a common maths convention opposite to that in physics
• 
  Penrose tiling of gingerbread men
• 
  Penrose tiling like a Roman floor
• 
  Perspective projection of a tesseract with hidden vertex elimination.
• 
  Tesseract with hidden volume elimination showing nearest point (updated from Tetracube)
• 
  Demonstrate that the projection of a square can be concave
• 
  Normalized IQ distribution mean 100 and standard deviation 15