Into how many regions do they divide the plane?
16582
Show that $n$ lines separate the plane into $\frac{n^2+n+2}{2}$ regions
76029
Induction proof: n lines in a plane
8469
Dividing an equilateral triangle into N equal (possibly non-connected) parts
105888
Find the number $b$ such that the line $y = b$ divides the region bounded by the curves $y = x^2$ and $y = 4$ into two regions with equal area.
137072
Number Of Distinct Paths In A Rectangular Grid
71711
Why a tesselation of the plane by a convex polygon of 7 or more sides is not possible?
70991
Find the equation of the plane knowing that it passes through 3 points
67774
Number of isosceles triangle.
5840
divides, not divides and cardinalities
99829
If a plane is divided by $n$ lines, then it is possible to color the regions formed with only two colors.
140625
What is the area of a polygon with n equal length sides?
12775
Mapping half-plane to unit disk?
86815
Cutting a section from a sphere by planes
25053
How do I find the area of this region?
6120
What is the name of the horizontal division line?
41900
Split polygons into equal areas within each region
53131
What is the name for the region enclosed by an $n$ dimensional object?