An angle measuring `91^(@)` is

Options

A. an acute angle
B. an obtuse angle
C. a reflex angle
D. none of these

Answer

To determine what type of angle measures 91 degrees, we can follow these steps:

### Step 1: Understand the types of angles
We need to know the definitions of different types of angles:
- **Acute Angle**: An angle that measures less than 90 degrees.
- **Right Angle**: An angle that measures exactly 90 degrees.
- **Obtuse Angle**: An angle that measures more than 90 degrees but less than 180 degrees.
- **Straight Angle**: An angle that measures exactly 180 degrees.
- **Reflex Angle**: An angle that measures more than 180 degrees but less than 360 degrees.
- **Complete Angle**: An angle that measures exactly 360 degrees.

### Step 2: Identify the range for 91 degrees
Now, we need to see where 91 degrees fits in the definitions:
- 91 degrees is greater than 90 degrees and less than 180 degrees.

### Step 3: Classify the angle
Since 91 degrees is more than 90 degrees but less than 180 degrees, we classify it as an **Obtuse Angle**.

### Conclusion
Therefore, an angle measuring 91 degrees is an **Obtuse Angle**.

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