New posts in geometric-transformation

Prove that $BC$, $B_1C_1$, $B_2C_2$ are concurrent.

geometry euclidean-geometry geometric-transformation

Square inscribed in a right triangle problem

geometry euclidean-geometry circles locus geometric-transformation

For regular tetrahedron $ABCD$ with center $O$, and $\overrightarrow{NO}=-3\overrightarrow{MO}$, is $NA+NB+NC+ND\geq MA+MB+MC+MD$?

geometry contest-math euclidean-geometry geometric-inequalities geometric-transformation

Quadrilateral problem with midpoints of diagonals [duplicate]

quadrilateral geometric-transformation

What's the value of the area of the triangle $ABC$ below?

geometry euclidean-geometry plane-geometry geometric-construction geometric-transformation

Is there a possible geometric method to find length of this equilateral triangle?

geometry vectors euclidean-geometry analytic-geometry geometric-transformation

Transform point in the Poincaré disc to point in tile

hyperbolic-geometry tiling geometric-transformation tessellations

Angles of triangle $\triangle XYZ$ do not depend on the position of point $P$ (proof needed)

geometry euclidean-geometry triangles quadrilateral geometric-transformation

Locating three sets of collinear points

geometry euclidean-geometry circles geometric-transformation

Given $AB = 2$ and $AC = 3$, what are $AD$, $BD$, $m∠BAD$ and $m∠ABD$? [closed]

geometry angle rectangles geometric-transformation

Stuck on a Geometry Problem

geometry euclidean-geometry rotations symmetry geometric-transformation

Concurrency of three lines in a multiple tangent circles configuration

geometry circles geometric-transformation

Locus of point with constant angle

geometry euclidean-geometry geometric-transformation synthetic-differential-geometry