New posts in Geometric Transformation

Point within the interior of a given angle

A geometry question...

To prove $EA = FB$ or that $CQ'$ is radical axis

A Transformation of a cross-shaped grid filled with 1s (Proof of impossibility?)

To show the center of homothety of the biggest and smallest circle lies in the common tangent over T

CGMO 2020: Prove that $X, P, Q, Y$ are concyclic.

Rotating a quarter circle -- how long has a point traveled.

Find angle in triangle $ABC$ with cevian line $AD$, such that $AB=CD$.

Finding angle $x$, a geometry question

Square inscribed in a right triangle problem