New posts in Solid Geometry

Intuitively understanding why the volume of a cylinder of height $h$ and radius $R$ is $\pi R^2h$

Intersection of perpendicular chords: is this true for a sphere?

Tetrahedron circumradius in high dimensions

Volume of regular octahedron

Viewing a circle from different angles - is the result always an ellipse?

Minimal surfaces for planar octagons and nonagons

Tetrahedron Centers

Hole inside cube with tetrahedrons at corners?

Making a regular tetrahedron out of concrete

What is the name of the polyhedral shape of the Humanity Star?