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Let's analyze the triangles based on their angle measures to determine if they are acute, obtuse, or right:

1. **Triangle A**:
   - Angles: 50°, 80°, 50°
   - All angles are less than 90°, which makes this an **acute triangle**.

2. **Triangle B**:
   - Angles: 35°, 55°, 90°
   - It has a 90° angle, which makes this a **right triangle**.

3. **Triangle C**:
   - Angles: 120°, 30°, 30°
   - One angle is greater than 90°, which makes this an **obtuse triangle**.

4. **Triangle D**:
   - Angles: 35°, 115°, 30°
   - One angle is greater than 90°, so this is also an **obtuse triangle**.

**Summary of Answers:**
- Triangle A: Acute
- Triangle B: Right
- Triangle C: Obtuse
- Triangle D: Obtuse

Would you like more details or have any questions?

### Here are 5 related questions:
1. What is the sum of interior angles in any triangle?
2. How can you differentiate between acute, obtuse, and right triangles based on angle measures?
3. Can a triangle have more than one right or obtuse angle? Why or why not?
4. How do you calculate the third angle in a triangle if two angles are given?
5. What is the difference between an isosceles triangle and a scalene triangle?

### Tip:
Always remember, the sum of interior angles in a triangle is always 180°, which helps in finding missing angles.

Are the triangles below acute, obtuse, or right?

Determine whether triangles are acute, obtuse, or right based on their angle measures. This problem reviews geometry concepts, including the classification of triangles and the properties of angles. Suitable for students in Grades 6-8.

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