An Angle Larger Than 90 Degrees; to Be Oblivious
Puzzle 7 of Beat the Heat Pack
Question is: An Angle Larger Than 90 Degrees; to Be Oblivious
and the answer is: OBTUSE
Word Meaning:
OBTUSE — (now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form.
Definitions from Wiktionary.