Identifying angles activity - Free Printable

To solve the problem of classifying each angle as right, acute, obtuse, reflex, or straight, we need to understand the definitions of these types of angles:

1. Right Angle: An angle that measures exactly 90 degrees.
2. Acute Angle: An angle that measures less than 90 degrees.
3. Obtuse Angle: An angle that measures more than 90 degrees but less than 180 degrees.
4. Reflex Angle: An angle that measures more than 180 degrees but less than 360 degrees.
5. Straight Angle: An angle that measures exactly 180 degrees.

Now, let's classify each angle in the image step by step:

Row 1:

1. Angle: This is a right angle (exactly 90 degrees).
- Classification: Right
2. Angle: This is an acute angle (less than 90 degrees).
- Classification: Acute
3. Angle: This is an obtuse angle (more than 90 degrees but less than 180 degrees).
- Classification: Obtuse

Row 2:

4. Angle: This is a reflex angle (more than 180 degrees but less than 360 degrees).
- Classification: Reflex
5. Angle: This is a right angle (exactly 90 degrees).
- Classification: Right
6. Angle: This is an obtuse angle (more than 90 degrees but less than 180 degrees).
- Classification: Obtuse

Row 3:

7. Angle: This is an obtuse angle (more than 90 degrees but less than 180 degrees).
- Classification: Obtuse
8. Angle: This is a reflex angle (more than 180 degrees but less than 360 degrees).
- Classification: Reflex
9. Angle: This is an obtuse angle (more than 90 degrees but less than 180 degrees).
- Classification: Obtuse

Row 4:

10. Angle: This is an obtuse angle (more than 90 degrees but less than 180 degrees).
- Classification: Obtuse
11. Angle: This is an acute angle (less than 90 degrees).
- Classification: Acute
12. Angle: This is a straight angle (exactly 180 degrees).
- Classification: Straight

Row 5:

13. Angle: This is an obtuse angle (more than 90 degrees but less than 180 degrees).
- Classification: Obtuse
14. Angle: This is a right angle (exactly 90 degrees).
- Classification: Right
15. Angle: This is a reflex angle (more than 180 degrees but less than 360 degrees).
- Classification: Reflex

Final Answer:

\[
\boxed{
\begin{array}{ccc}
\text{Right} & \text{Acute} & \text{Obtuse} \\
\text{Reflex} & \text{Right} & \text{Obtuse} \\
\text{Obtuse} & \text{Reflex} & \text{Obtuse} \\
\text{Obtuse} & \text{Acute} & \text{Straight} \\
\text{Obtuse} & \text{Right} & \text{Reflex} \\
\end{array}
}
\]