Geometry: Introduction to Geometry (Level 5 of 7)

The video tutorial covers the basics of sets, including union, intersection, and empty sets. It provides examples of naming lines, finding intersections of lines and rays, and understanding the union of rays. The tutorial also explores the intersection of rays as line segments and the intersection of a triangle with a ray.

What is the union of two sets A and B?

• A set containing only the elements unique to B

• A set containing only the elements common to both A and B

• A set containing all elements from A and B, including common elements

• A set containing only the elements unique to A

What does an empty set represent?

• A set with duplicate elements

• A set with infinite elements

• A set with no elements

• A set with one element

How can a line be named?

• By using any two points on the line or a lowercase letter

• By using three points on the line

• By using only one point on the line

• By using a capital letter

Where do line AC and line DE intersect?

• At point B

• At point D

• At point A

• At point C

What is the result of the union of ray BA and ray BD?

• A triangle

• A point

• An angle

• A line segment

What is the intersection of ray AB with ray CA?

• Point A

• Line segment AC

• Ray CA

• Ray AB

Where do triangle ABC and ray DE intersect?

• At point D

• At point F

• At point B

• At point A