Revision Questions on Lines and Angles

What type of angle is formed when two lines are perpendicular?

• Obtuse angle

• Acute angle

• Straight angle

• Right angle

Identify the angle shown: ∠ABC = 90°

• Straight angle

• Right angle

• Obtuse angle

• Acute angle

Classify the angle as acute, obtuse, or right: ∠XYZ = 100°

• Reflex

• Straight

• Obtuse

• Acute

Which pair of lines are parallel in the given figure?

• Line AB and Line CD are parallel.

• Line AB and Line GH are parallel.

• Line CD and Line EF are parallel.

• Line AB and Line EF are parallel.

Calculate the missing angle: ∠PQR = 45°, ∠PRQ = 90°

• 30

• 60

• 75

• 45

Identify the type of angle: ∠MNO = 120°

• Acute angle

• Right angle

• Straight angle

• Obtuse angle

How many right angles are there in a square?

• 2

• 3

• 4

• 5

Which pair of lines are perpendicular in the given figure?

• The pair of lines with slopes 1/2 and -2 are perpendicular.

• The pair of lines with slopes -1 and 1 are perpendicular.

• The pair of lines with slopes 3 and -3 are perpendicular.

• The pair of lines with slopes 2 and -1/2 are perpendicular.

Classify the angle as acute, obtuse, or right: ∠LMN = 75°

• obtuse

• reflex

• straight

• acute

Identify the type of angle: ∠DEF = 30°

• Straight angle

• Obtuse angle

• Acute angle

• Right angle