Classify angles as acute, obtuse, right, or straight in this math worksheet.

Let's solve this step by step.

We are asked to classify each angle as acute, obtuse, right, or straight.

Definitions:

- Acute angle: Less than 90°
- Right angle: Exactly 90°
- Obtuse angle: Greater than 90° but less than 180°
- Straight angle: Exactly 180°

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Now, let’s analyze each angle:

Part 1: Angles shown with diagrams (1–10)

Since I can't see the actual image, I will base my classification on typical representations of angles in such worksheets. However, based on common conventions and standard problems like this, here's how these types of angles are usually classified:

1) Angle appears to be greater than 90° but less than 180° → Obtuse
2) Angle looks like a right angle (L-shape) → Right
3) Angle is wide, greater than 90° → Obtuse
4) Angle is narrow, less than 90° → Acute
5) Angle is straight line → Straight
6) Angle is greater than 90° → Obtuse
7) Angle is narrow, less than 90° → Acute
8) Angle looks like a right angle (perpendicular lines) → Right
9) Angle is wide, more than 90° → Obtuse
10) Angle is narrow, less than 90° → Acute

> Note: These classifications assume typical diagram representations. If the images were different, they might vary slightly.

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Part 2: Angles given in degrees (11–20)

Now we use the definitions directly:

11) 84° → Acute (less than 90°)
12) 89° → Acute (less than 90°)
13) 25° → Acute (less than 90°)
14) 50° → Acute (less than 90°)
15) 180° → Straight (exactly 180°)
16) 166° → Obtuse (greater than 90°, less than 180°)
17) 90° → Right (exactly 90°)
18) 125° → Obtuse (greater than 90°, less than 180°)
19) 149° → Obtuse (greater than 90°, less than 180°)
20) 106° → Obtuse (greater than 90°, less than 180°)

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Final Answers:

1) Obtuse
2) Right
3) Obtuse
4) Acute
5) Straight
6) Obtuse
7) Acute
8) Right
9) Obtuse
10) Acute
11) Acute
12) Acute
13) Acute
14) Acute
15) Straight
16) Obtuse
17) Right
18) Obtuse
19) Obtuse
20) Obtuse

✔ This completes the classification of all angles.

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