Dots and lines (knot theorem)
7355
Materials for learning TikZ
153767
Singular points and tangent lines
152107
Classic Circle and Adjacent Arrangement Problem
44887
The intersection of two parallel lines
81375
Why does $V(I(S))=\overline{S}$?
109740
Bresenham's line algorithm
73037
Geometric visualization of nested radicals
41907
Triangulation of a simple polygon (elementary proof?)
141101
Russia (2000) contest:Prove the existence of a pair of rows and columns with intersections differently coloured
29810
Derivation of a generalization of Mertens' Third Theorem.
91090
Trying to understand the idea behind path independence for line integrals
79328
Proposition 5.15 from Atiyah and Macdonald: Integral Closure and Minimal Polynomial
111421
Quick way to subtract white outline from knotwork pattern in Illustrator?
76586
How to prove that linear transformations transforms lines into lines
146933
Proving bipartition in a connected planar graph
141482
Proof that plane with $N$ lines can be painted with two colors so that any two neighboring regions are painted in different colors
157213
Application of Luca's theorem