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Classify and Measure Angles - K12 Math Worksheets - Free Printable

Classify and Measure Angles - K12 Math Worksheets

Educational worksheet: Classify and Measure Angles - K12 Math Worksheets. Download and print for classroom or home learning activities.

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Show Answer Key & Explanations Step-by-step solution for: Classify and Measure Angles - K12 Math Worksheets
To solve the problem of classifying the angles as acute, obtuse, right, straight, or reflex, we need to understand the definitions of each type of angle:

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

Now, let's classify each angle in the image based on these definitions:

Image Analysis and Classification:



1. Angle 1:
- The angle is greater than 90 degrees but less than 180 degrees.
- Classification: Obtuse

2. Angle 2:
- The angle is exactly 90 degrees.
- Classification: Right

3. Angle 3:
- The angle is greater than 180 degrees but less than 360 degrees.
- Classification: Reflex

4. Angle 4:
- The angle is less than 90 degrees.
- Classification: Acute

5. Angle 5:
- The angle is exactly 90 degrees.
- Classification: Right

6. Angle 6:
- The angle is greater than 90 degrees but less than 180 degrees.
- Classification: Obtuse

7. Angle 7:
- The angle is exactly 180 degrees.
- Classification: Straight

8. Angle 8:
- The angle is greater than 180 degrees but less than 360 degrees.
- Classification: Reflex

9. Angle 9:
- The angle is less than 90 degrees.
- Classification: Acute

Final Answer:


\[
\boxed{
\begin{array}{ccc}
1) & \text{Obtuse} & 2) & \text{Right} & 3) & \text{Reflex} \\
4) & \text{Acute} & 5) & \text{Right} & 6) & \text{Obtuse} \\
7) & \text{Straight} & 8) & \text{Reflex} & 9) & \text{Acute} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of reflex angle worksheet.
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