Classifying Triangles Worksheet | Download Free Printables For Kids - Free Printable

Let's solve the Classifying Triangles Worksheet by identifying each triangle based on its angles. We classify triangles as:

- Acute: All three angles are less than 90°.
- Right: One angle is exactly 90° (a right angle).
- Obtuse: One angle is greater than 90°.

We'll go through each triangle one by one.

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1)

- Angles: 35°, 55°, and a right angle (90°) shown with a square corner.
- Since one angle is 90°, this is a Right triangle.

✔ Answer: Right

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2)

- Angles: 109°, 54°, 34°
- One angle is 109°, which is greater than 90° → Obtuse
- So, this is an Obtuse triangle.

✔ Answer: Obtuse

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3)

- Angles: 79°, 52°, 53°
- All angles are less than 90° → Acute
- So, this is an Acute triangle.

✔ Answer: Acute

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4)

- Angles: 60°, 97°, 84°
- One angle is 97°, which is greater than 90° → Obtuse
- So, this is an Obtuse triangle.

✔ Answer: Obtuse

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5)

- Angles: 10°, 57°, 52°
- All angles are less than 90° → Acute
- So, this is an Acute triangle.

✔ Answer: Acute

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6)

- Angles: 26°, 64°, and a right angle (90°) shown with a square corner.
- One angle is 90°, so this is a Right triangle.

✔ Answer: Right

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7)

- Angles: 50°, 40°, and a right angle (90°) shown with a square corner.
- One angle is 90°, so this is a Right triangle.

✔ Answer: Right

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8)

- Angles: 38°, 50°, 67°
- All angles are less than 90° → Acute
- So, this is an Acute triangle.

✔ Answer: Acute

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9)

- Angles: 15°, 138°, 30°
- One angle is 138°, which is greater than 90° → Obtuse
- So, this is an Obtuse triangle.

✔ Answer: Obtuse

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✔ Final Answers:

1) Right
2) Obtuse
3) Acute
4) Obtuse
5) Acute
6) Right
7) Right
8) Acute
9) Obtuse

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📝 Summary:

| Number | Classification |
|--------|----------------|
| 1 | Right |
| 2 | Obtuse |
| 3 | Acute |
| 4 | Obtuse |
| 5 | Acute |
| 6 | Right |
| 7 | Right |
| 8 | Acute |
| 9 | Obtuse |

Let me know if you'd like a printable version or explanation of how to find missing angles!