Question

1. which angles are less than 90 degrees?

a. straight angle
b. right angle
c. obtuse angle
d. acute angle

Explanation:

• A straight angle is \(180^{\circ}\).
• A right angle is \(90^{\circ}\).
• An obtuse angle is greater than \(90^{\circ}\) but less than \(180^{\circ}\).
• An acute angle is less than \(90^{\circ}\).

Answer:

d. Acute Angle