Added a draft of "Calculating the exact coordinates of the vertices of a polygram (star polygon)"
Added a draft of "Calculating the exact coordinates of the vertices of a polygram (star polygon)"

asukakenji/cheatsheets,asukakenji/cheatsheets,asukakenji/cheatsheets,asukakenji/cheatsheets,asukakenji/cheatsheets,asukakenji/cheatsheets