New posts in euclidean-geometry

With what analytic functions can one construct the $(x,y)$ coordinate axes using a straightedge and a compass?

euclidean-geometry analytic-geometry

Hypercube and Hyperspheres

algebraic-geometry euclidean-geometry integer-lattices combinatorial-geometry extremal-combinatorics

Tetrahedron triangular section [closed]

geometry euclidean-geometry

Is there a geometric proof of this geometric interpretation of the Vandermonde determinant formula?

euclidean-geometry determinant area

Maximum area of a rectangle inscribed in a triangle is $1/2$ the area of triangle

geometry euclidean-geometry triangles

Strange point lies on common tangent of 9-point circle and incircle

geometry euclidean-geometry

Proving collinear points

euclidean-geometry circles

Could Euclid have proven that multiplication of real numbers distributes over addition?

real-analysis geometry euclidean-geometry math-history real-numbers

Isometric embedding of $(\mathbb{R}^2, d_\infty)$ into $(\mathbb{R}^m,d_2)$?

metric-spaces euclidean-geometry riemannian-geometry

Japanese theorem for cyclic quadrilaterals Proof Inversion

geometry euclidean-geometry quadrilateral

Triangulation of a simple polygon (elementary proof?)

general-topology euclidean-geometry

Calculate the area of intersection between the circles below as a function of A1 and A2.

geometry euclidean-geometry plane-geometry

The formal definition of “angle”

linear-algebra geometry euclidean-geometry analytic-geometry

Bisection of a a triangular area

geometry euclidean-geometry contest-math triangles area

What's the average width of a convex polygon?

euclidean-geometry

Prove that in a $4n$-gon, every other diagonal passes through a common point

geometry euclidean-geometry polygons

The concurrence of angle bisector, median, and altitude in an acute triangle

euclidean-geometry triangles

Calculate the ratio based on the lengths of edges of triangle

geometry euclidean-geometry triangles circles

Decomposable Families of Shapes

geometry reference-request euclidean-geometry polyhedra tiling

Smallest square containing a given triangle

euclidean-geometry triangles rectangles