How many regions do $n$ lines divide the plane into?
16582
Show that $n$ lines separate the plane into $\frac{n^2+n+2}{2}$ regions
66796
Describe the set of points on the complex plane...
97627
filling an occluded plane with the smallest number of rectangles
123939
N circles in the plane
89164
When is the graph of the divisor relation on $[n]$ planar?
108366
How to create an infinite plane in cycles?
62518
How many rectangles or triangles.
87054
line segments with edges into a curve
155993
A closed path is made up of 11 line segments. Can one line, not containing a vertex of the path, intersect each of its segments?
86815
Cutting a section from a sphere by planes
89361
Unit circle is divided into $n$ equal pieces, what is the least value of the perimeters of the $n$ parts?
148169
prove that line bisect section
23219
The plane minus $n$ points deformation retracts onto...
85972
Name for region between two parallel planes
157209
How to plot a distribution of planes
130700
Calculate intersection of a line with a plane
53861
N points on a Circle