State which of the following angles with a small letter in the following diagrams are acute, which are obtuse and which are reflex:

(i) In the given figure:

Angle a is less than 90°, so ∠a is acute.

Angle b is greater than 90°, so ∠b is obtuse.

Angle c is less than 90°, so ∠c is acute.

(ii) In the given figure:

∠x is greater than 90°, so ∠x is obtuse.

∠y is less than 90° so ∠y is acute.

∠z is between 90° and 180°, so ∠z is obtuse.

(iii) In the given figure:

∠p is greater than 90°, so ∠p is obtuse.

∠q is less than 90°, so ∠q is acute.

∠r is between 180° and 360°, so ∠r is reflex.

∠s is less than 90°, so ∠s is acute.