New posts in Euclidean Geometry

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

How to find area covered by a car windshield wiper when it swaps a certain angle?

Calculate area of polygon inside unit square

In trapezoid $ABCD$, $AB \parallel CD$ , $AB = 4$ cm and $CD = 10$ cm.

Six points on an ellipse: generalizing Conway's Circle Theorem

A generalization of Bottema's theorem

Prove that $\frac{AB}{AE} + \frac{AD}{AG} = \frac{AC}{AF}$ in parallelogram $ABCD$, where $E$, $F$, $G$ are points on a line intersecting the sides

Proof of relationship $S^2−S(a+b+c+d+e)+ab+bc+cd+de+ea=0$ between areas connected to a pentagon

Angles enclosed in parallel lines

How to show that there exist no four circles as in the picture?