Question

1. classify the following angle. straight right acute obtuse

Explanation:

Step1: Recall the definitions of different angles

• A straight angle is \(180^{\circ}\).
• A right angle is \(90^{\circ}\).
• An acute angle is an angle with \(0^{\circ}<\theta < 90^{\circ}\).
• An obtuse angle is an angle with \(90^{\circ}<\theta < 180^{\circ}\).

Step2: Analyze the given angle

The given angle is less than \(90^{\circ}\) as per its visual appearance (the angle - opening is narrow and not a right - angle, straight - angle or obtuse - angle).

Answer:

acute