1) Forming no angle 2) Not forming an angle 3) Without an angle 4) Without angles 
making no angle
• (a.) Not forming an angle.
Not forming an angle. ... <physics> Agonic line, an imaginary line on the earth's surface passing through those places where the magnetic needle points to the true north; the line of no magnetic variation. There is one such line in the Western hemisphere, and another in the Eastern hemisphere. ... Origin: Gr. Without angles; priv. + an angle....
A·gon'ic adjective [ Greek ... without angles; 
agonic Not forming an angle; no angle.
not forming an angle.