Triangles All Around
On four pegs, can only draw one triangle. It has angles of 90, 45,
45 (can be split into two isosceles which each have a radius as two
sides).
On six pegs, can draw three triangles.
One has angles of 120, 30 and 30.
One has angles of 60, 30 and 90.
One has angles of 60, 60 and 60.
On eight peg board, can make five triangles.
One has angles of 135, 22.5 and 22.5.
One has angles of 112.5, 45 and 22.5.
One has angles of 90, 67.5 and 22.5.
One has angles of 90, 45 and 45.
One has angles of 67.5, 67.5 and 45.