Exploring Angles and Lines

Which of the following best describes a line segment?

• A straight path that extends in both directions without end

• A straight path between two endpoints that does not extend beyond them

• A straight path that starts at one point and extends in one direction without end

• A curved path between two points

An angle measures 75°. What type of angle is it?

• Right angle

• Obtuse angle

• Acute angle

• Straight angle

A full circle contains 360°. If an angle takes up 1/4 of a circle, what is the measure of that angle?

• 45°

• 180°

• 120°

• 90°

Which of the following correctly describes perpendicular lines?

• Lines that never intersect and are always the same distance apart

• Lines that intersect at a right angle (90°)

• Lines that intersect at an acute angle

• Lines that curve toward each other

Two rays share a common endpoint. The angle formed measures 110°. What type of angle is this?

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

An angle measures 1/6 of a full circle. Using the fact that a full circle is 360°, what is the measure of this angle?

• 30°

• 60°

• 72°

• 45°

Which of the following is an example of parallel lines?

• Two roads that cross at an intersection

• The two rails of a straight railroad track

• Two roads that meet at a corner forming a right angle

• Two line segments that share an endpoint

A right angle measures exactly 90°. If you see an angle that is smaller than 90°, what type of angle is it?

• Obtuse

• Straight

• Reflex

• Acute

An angle measures 1/3 of a full circle. What is the measure of this angle in degrees?

• 90°

• 120°

• 180°

• 60°

Which geometric figure starts at one endpoint and extends infinitely in only one direction?

• Line

• Line segment

• Ray

• Angle