New posts in Geometric Construction

A conjecture about the sum of the areas of three triangles built on the sides of any given triangle

A conjecture related to any triangle

Elliptical version of Pythagoras’ Theorem?

On The Construction Of An Ellipse

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

Which roots of irreducible quartic polynomials are constructible by compass and straightedge?

Evaluating $\sum_{k=0}^\infty \left(\frac{1}{5k+1} - \frac{1}{5k+2} - \frac{1}{5k+3} + \frac{1}{5k+4} \right)$

How to intersect a line with a point off the page using a straight edge and compass (see description)

How do you know if a line is straight?

Inscribing rhombus in a triangle's angle in only eight compass-and-straightedge steps