Let's solve this step by step. The task is to
identify the type of angle for each of the 15 given angles.
We'll use the standard classifications of angles based on their measures:
-
Acute angle: Less than 90°
-
Right angle: Exactly 90°
-
Obtuse angle: Greater than 90° but less than 180°
-
Straight angle: Exactly 180°
-
Reflex angle: Greater than 180° but less than 360°
-
Full rotation (or complete angle): Exactly 360°
Now, let’s go through each one:
---
1.
- It shows a straight line with a semicircle arc.
- This represents
180°.
-
✔ Straight angle
---
2.
- Angle =
29°
- Less than 90°
-
✔ Acute angle
---
3.
- Has a small square symbol at the vertex → indicates
90°
-
✔ Right angle
---
4.
- Angle =
10°
- Less than 90°
-
✔ Acute angle
---
5.
- Angle =
171°
- Between 90° and 180°
-
✔ Obtuse angle
---
6.
- The angle shown is more than 180° (it goes beyond a straight line)
- Looks like it's around 270° or so (but not full circle)
-
✔ Reflex angle
---
7.
- Angle =
91°
- Greater than 90°, less than 180°
-
✔ Obtuse angle
---
8.
- A full circle with a ray going through it.
- Represents a
full rotation → 360°
-
✔ Full rotation (or complete angle)
---
9.
- Angle =
85°
- Less than 90°
-
✔ Acute angle
---
10.
- Angle =
180°, shown as a straight line
-
✔ Straight angle
---
11.
- Angle =
108°
- Between 90° and 180°
-
✔ Obtuse angle
---
12.
- Two rays pointing in opposite directions vertically — forms a straight line
- So, angle =
180°
-
✔ Straight angle
---
13.
- Angle =
239°
- Greater than 180°, less than 360°
-
✔ Reflex angle
---
14.
- A full circle with no indication of a specific angle, but the shape is a complete circle
- Represents
360°
-
✔ Full rotation (or complete angle)
---
15.
- Angle =
90°, marked with a square symbol
-
✔ Right angle
---
Final Answers:
| # | Type of Angle |
|---|------------------------|
| 1 | Straight angle |
| 2 | Acute angle |
| 3 | Right angle |
| 4 | Acute angle |
| 5 | Obtuse angle |
| 6 | Reflex angle |
| 7 | Obtuse angle |
| 8 | Full rotation |
| 9 | Acute angle |
| 10| Straight angle |
| 11| Obtuse angle |
| 12| Straight angle |
| 13| Reflex angle |
| 14| Full rotation |
| 15| Right angle |
✔ All identified correctly!
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Parent Tip: Review the logic above to help your child master the concept of angle worksheet.
