True or false: what a diagram shows

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A circle stands for a class of things.

2. Statement is true

   Yes

   Statement

   Circles inside one another show that all of one is in the other.

3. Statement is true

   Yes

   Statement

   Circles that never meet show the classes share no members.

4. Statement is true

   No

   Statement

   The SIZE of a circle shows how many members the class has.

5. Statement is true

   Yes

   Statement

   Overlapping circles show that some members are shared.

Explanation