Circles partitioning the plane
123939
N circles in the plane
24146
Number of ways to partition a rectangle into n sub-rectangles
121402
Planar Realization of a Graph in Three-Space
37448
Two Circles and Tangents from Their Centers Problem
85650
Number or regions formed when $n$ points on a circle are joined
59123
Mapping circles via inversion in the complex plane
52594
Can all circles of radius $1/n$ be packed in a unit disk, excluding the circle of radius $1/1$?
5539
Partition into interval graphs
147861
Packing squares into a circle
16582
Show that $n$ lines separate the plane into $\frac{n^2+n+2}{2}$ regions
14718
How do I divide a circle into equal parts like a pie chart with Adobe Illustrator?
152651
Generating visually pleasing circle packs
44811
Intersection of Common Chords of Three Circles
68441
Loop cut maintaining circular profile
123626
Prove that even $n$ can be partitioned to $\frac n2$ edges
143525
line segment joining two centers of circles is perpendicular to line segment joining two intersection point of the circles
100939
Circle with two borders