Group 1
An angle measuring 45° is called:
A. Right Angle
B. Obtuse Angle
C. Acute Angle
D. Straight Angle
Answer: C. Acute Angle
A right angle measures:
A. 45°
B. 90°
C. 180°
D. 360°
Answer: B. 90°
Which of the following is a straight angle?
A. 80°
B. 120°
C. 180°
D. 360°
Answer: C. 180°
An angle measuring 135° is:
A. Acute Angle
B. Right Angle
C. Obtuse Angle
D. Reflex Angle
Answer: C. Obtuse Angle
Which of the following angles is a reflex angle?
A. 175°
B. 180°
C. 225°
D. 90°
Answer: C. 225°
Which statement is correct?
A. Acute angles are greater than 90°.
B. Reflex angles are between 180° and 360°.
C. Straight angles are less than 90°.
D. Complete angles measure 180°.
Answer: B. Reflex angles are between 180° and 360°.
Which sequence correctly arranges the angle types from the smallest measure to the largest measure?
A. Right, Acute, Obtuse, Straight, Reflex, Complete
B. Acute, Right, Obtuse, Straight, Reflex, Complete
C. Acute, Obtuse, Right, Straight, Complete, Reflex
D. Right, Acute, Straight, Obtuse, Reflex, Complete
Answer: B. Acute, Right, Obtuse, Straight, Reflex, Complete
Which one of the following sets contains exactly one angle of each type: Acute, Right, Obtuse, and Reflex?
A. 60°, 90°, 120°, 240°
B. 45°, 180°, 120°, 270°
C. 30°, 90°, 180°, 360°
D. 80°, 100°, 180°, 270°
Answer: A. 60°, 90°, 120°, 240°
Which of the following statements is NOT correct?
A. Every acute angle is smaller than a right angle.
B. Every obtuse angle is greater than 90° but less than 180°.
C. Every reflex angle is greater than 180° but less than 360°.
D. Every angle greater than 90° is a reflex angle.
Answer: D. Every angle greater than 90° is a reflex angle.