New posts in Geometric Transformation

Geometry - Proving a common centroid.

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

Stuck on a Geometry Problem

EGMO Problem 3.20 (BAMO 2013/3)

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

Nine-point circle - proof using plane geometry

What is the radius and center of the image of $|z|=1$ under $ f(z) = \frac{3z+2}{4z+3}$?

Can't figure out this triangle geometry problem

Use complex numbers to prove that the composition of rotations is another rotation

If $|z| < 1$, prove that $\Re \left(\frac{1}{1 - z} \right) > \frac{1}{2}$.