Understanding Angles and Lines

What is the measure of a right angle?

• 120 degrees

• 90 degrees

• 45 degrees

• 180 degrees

Identify the type of angle that measures more than 90 degrees.

• Right angle

• Acute angle

• Straight angle

• Obtuse angle

What do you call two lines that never intersect?

• Intersecting lines

• Parallel lines

• Perpendicular lines

• Curved lines

If two angles are complementary, what is the sum of their measures?

• 60 degrees

• 180 degrees

• 90 degrees

• 45 degrees

What type of angle measures exactly 180 degrees?

• Straight angle

• Reflex angle

• Obtuse angle

• Acute angle

Identify the term for angles that are opposite each other when two lines intersect.

• Complementary angles

• Vertical angles

• Adjacent angles

• Supplementary angles

What do you call a line that touches a circle at exactly one point?

• Diameter

• Chord

• Secant

• Tangent

If two lines are perpendicular, what is the relationship between their slopes?

• The slopes are equal to each other.

• The slopes add up to one.

• The slopes are both positive.

• The slopes are negative reciprocals of each other.

What is the name of an angle that measures less than 90 degrees?

• Obtuse angle

• Right angle

• Straight angle

• Acute angle

Identify the term for a pair of angles that add up to 360 degrees.

• Supplementary angles

• Explementary angles

• Complementary angles

• Adjacent angles