New posts in Spherical Geometry

Intersection of two arcs on sphere

What is the metric tensor on the n-sphere (hypersphere)?

Great arc distance between two points on a unit sphere

Formula for the fourth side of a spherical quadrilateral

How to calculate the area of a circle ( given: origin, radius ) on a sphere ( Earth )?

Deriving the Surface Area of a Spherical Triangle

Is an equilateral triangle the same as an equiangular triangle, in any geometry?

How to calculate a heading on the earths surface?

The mean of points on a unit n-sphere $S^n$

what-if.xkcd.com: stabbing (simply connected) regions on the 2-sphere with few geodesics