Angle That's Not a Multiple of 90 Degrees
This page is the CodyCross answer for the clue below from Treasure Island, Group 1029, Puzzle 2 (Quartermaster).
Question is: Angle That's Not a Multiple of 90 Degrees
and the answer is: OBLIQUE
Word Meaning:
OBLIQUE — Not erect or perpendicular; not parallel to, or at right angles from, the base.
Definitions from Wiktionary.