[RegulatorCountry]

“What we’re seeing is a clever trick of spherical geometry. For structures on this scale, a polygon with 120-degree angles at the corners actually has four sides instead of six,” explained Andrews-Hanna when explaining the lunar feature compared to similar valley’s here on our planet.

A six-sided polygon is a six-sided polygon. Scale does not change the rules of geometry nor does viewing a polygon on a sphere. If he means there's an optical illusion of a rectangle due to distortion from viewing a polygon on a sphere, it could certainly be stated more clearly.

The errant apostrophe really adds credibility too, by the way, lol.

[SunkenCiv]

Draw a triangle on a sphere with one corner on one of the poles, and the other two corners on the Equator, and you have a triangle with three 90 degree corners. The surface of a sphere can be covered by eight of those.

Split the surface of the sphere into four equal triangles and you have four triangles with 120 degree corners. These are consequences of spherical geometry.