A triangle whose one angle is more than `90^@` is called

Options

A. a scalene triangle
B. a right triangle
C. an acute triangle
D. an obtuse triangle

Answer

To solve the question, we need to identify the type of triangle based on the measurement of its angles.

### Step-by-Step Solution:

1. **Understand the Types of Triangles**:
- A **scalene triangle** has all sides of different lengths.
- A **right-angled triangle** has one angle that is exactly 90 degrees.
- An **acute triangle** has all angles less than 90 degrees.
- An **obtuse triangle** has one angle that is greater than 90 degrees.

2. **Analyze the Given Condition**:
The question states that we are looking for a triangle with one angle that is more than 90 degrees.

3. **Identify the Correct Type**:
- Since we are looking for a triangle where one angle is greater than 90 degrees, we can eliminate the scalene, right-angled, and acute triangles.
- The only type of triangle that fits this description is the **obtuse triangle**.

4. **Conclusion**:
Therefore, a triangle whose one angle is more than 90 degrees is called an **obtuse triangle**.

### Final Answer:
A triangle whose one angle is more than 90 degrees is called an **obtuse triangle**.

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