The problem asks us to identify the type of angle for each of the given figures a) through f). The types of angles we will be identifying are: acute, right, obtuse, straight, and reflex. * An acute angle is an angle that measures between $0^\circ$ and $90^\circ$. * A right angle is an angle that measures exactly $90^\circ$. * An obtuse angle is an angle that measures between $90^\circ$ and $180^\circ$. * A straight angle is an angle that measures exactly $180^\circ$. * A reflex angle is an angle that measures between $180^\circ$ and $360^\circ$.

1. Problem Description

The problem asks us to identify the type of angle for each of the given figures a) through f). The types of angles we will be identifying are: acute, right, obtuse, straight, and reflex.

* An acute angle is an angle that measures between $0^\circ$ and $90^\circ$.

* A right angle is an angle that measures exactly $90^\circ$.

* An obtuse angle is an angle that measures between $90^\circ$ and $180^\circ$.

* A straight angle is an angle that measures exactly $180^\circ$.

* A reflex angle is an angle that measures between $180^\circ$ and $360^\circ$.

2. Solution Steps

a) The angle appears to be greater than $90^\circ$ and less than $180^\circ$.

Therefore, it is an obtuse angle.

b) The angle appears to be less than $90^\circ$.

Therefore, it is an acute angle.

c) The angle appears to be greater than $180^\circ$ and less than $360^\circ$.

Therefore, it is a reflex angle.

d) The angle is marked with a square, indicating that it is a right angle.

Therefore, it is a right angle.

e) The angle appears to be exactly $180^\circ$, forming a straight line.

Therefore, it is a straight angle.

f) The angle appears to be less than $90^\circ$.

Therefore, it is an acute angle.

3. Final Answer

a) Obtuse angle

b) Acute angle

c) Reflex angle

d) Right angle

e) Straight angle

f) Acute angle