1 give 3 example of acute angle, 2 give 3 example of obtuse angle, 3 give 3 example of reflex angle, A give 3 example of complementary angle

Here are the examples for each type of angle:

1) An acute angle is an angle measuring less than $90^\circ$.
Examples:

• $30^\circ$
• $45^\circ$
• $80^\circ$ $\boxed{\text{Acute angles: } 30^\circ, 45^\circ, 80^\circ}$

2) An obtuse angle is an angle measuring greater than $90^\circ$ but less than $180^\circ$.
Examples:

• $100^\circ$
• $135^\circ$
• $160^\circ$ $\boxed{\text{Obtuse angles: } 100^\circ, 135^\circ, 160^\circ}$

3) A reflex angle is an angle measuring greater than $180^\circ$ but less than $360^\circ$.
Examples:

• $200^\circ$
• $270^\circ$
• $315^\circ$ $\boxed{\text{Reflex angles: } 200^\circ, 270^\circ, 315^\circ}$

4) Complementary angles are two angles whose sum is $90^\circ$.
Examples:

• $30^\circ$ and $60^\circ$ ($30^\circ + 60^\circ = 90^\circ$)
• $40^\circ$ and $50^\circ$ ($40^\circ + 50^\circ = 90^\circ$)
• $15^\circ$ and $75^\circ$ ($15^\circ + 75^\circ = 90^\circ$) $\boxed{\text{Complementary angles: } (30^\circ, 60^\circ), (40^\circ, 50^\circ), (15^\circ, 75^\circ)}$