Question

1. what is the negation of the following statement?

at least one angle is acute.

none of the angles are acute.

at least one angle is not acute.

Explanation:

The original statement is "At least one angle is acute". The negation of "at least one" (which is an existential quantifier) is "none" (a universal quantifier). So the negation should be about all angles not being acute.

Answer:

None of the angles are acute.