Question

3)
obtuse
6)
acute
9)
se and one right angle.

Explanation:

1. For question 3: The angle is wider than 90° but less than 180°, so it is obtuse.
2. For question 6: The angle is narrower than 90°, so it is acute.
3. For question 9: The angle is wider than 90° but less than 180°, so it is obtuse.

Answer:

1. Obtuse
2. Acute
3. Obtuse