New posts in euclidean-geometry

Does $\triangle ABC$ exist such that $\triangle ABC \sim \triangle DEF$, with $D, E, F$ being the incentre, centroid, orthocentre of $\triangle ABC$?

geometry euclidean-geometry triangles

Average shortest distance between some random points in a box

probability discrete-mathematics euclidean-geometry uniform-distribution geometric-probability

Intuitively, why should I expect a circle in the complex plane from the equation $\left|\frac{z-1}{z+1}\right| = c$?

geometry complex-numbers euclidean-geometry

What's the area of the isosceles trapezoide below?

geometry euclidean-geometry plane-geometry

Non-trivial questions about confocal ellipses

geometry euclidean-geometry conic-sections projective-geometry

Inside /outside test of the point on 2D plane

differential-geometry euclidean-geometry analytic-geometry coordinate-systems plane-geometry

Does Euclidean geometry require a complete metric space?

real-analysis soft-question euclidean-geometry model-theory axioms

Name of a Euclidean Geometry Theorem

terminology euclidean-geometry

Formula for distance between Incenter and Orthocenter.

geometry euclidean-geometry triangles

How to prove this general result on tucker circle?

euclidean-geometry plane-geometry

The Dido problem with an arclength constraint

differential-geometry euclidean-geometry plane-curves

Software for solving geometry questions

algebraic-geometry logic euclidean-geometry math-software quantifier-elimination

calculating triangle coordinates from 3 lengths and its euler rotation in 3d space

geometry euclidean-geometry

For compass and straightedge problems, are you allowed to use the compass as a ruler?

geometry euclidean-geometry geometric-construction

Find the area of ​the $AFRC$ quadrilateral below.

geometry euclidean-geometry plane-geometry

If $a$, $b$, and $c$ are sides of a triangle, then $\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}<2$.

inequality contest-math euclidean-geometry triangles geometric-inequalities

What are the postulates that can be used to derive geometry?

geometry big-list euclidean-geometry axioms

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

geometry vectors euclidean-geometry analytic-geometry geometric-transformation

Find the area of ​the triangular region ABC below

geometry euclidean-geometry plane-geometry

Matrix in canonical form of an orthogonal transformation

linear-algebra matrices linear-transformations euclidean-geometry transformation