The reason the shape changes from 3D to 2D when you get to six triangles has to do with the number of degrees in an equilateral triangle. There are 60 degrees at each vertex of the triangle, so ...

To see the Mars Triangle, Space.com suggests looking east around 6:30 p.m. local time. Mars is the brightest point and currently the vertex of the triangle, with Castor and Pollux making up the ...