Question

question 8 of 10
which statement is not correct?
a. a 100° angle is an obtuse angle
b. a 175° angle is a reflex angle.
c. the terminal side of a 225° angle is in quadrant iii.
d. an 85° angle is an acute angle.

Explanation:

• Option A: Obtuse angles are 90°<θ<180°, so 100° is obtuse (correct).
• Option B: Reflex angles are 180°<θ<360°, but 175°<180° (incorrect).
• Option C: 180°<225°<270°, so terminal side is in Quadrant III (correct).
• Option D: Acute angles are θ<90°, so 85° is acute (correct).

Answer:

B. A 175° angle is a reflex angle.