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Exercise 18

Avg difficulty 2.5

Determine whether the compound statement is true or false.

  1. An octogon has 8 sides or a rectangle has 5 sides.

  2. An octogon does not have 8 sides.

  3. If an octogon has 8 sides, then a triangle has three angles.

  4. Whales are not mammals and cats are mammals.

Lee et al., Math in Society, §1.1 Logic in Everyday Life, Exercise 18

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Adapted from Math in Society © 2018–2024 Portland Community College Math Instructors. Licensed under CC BY-SA 4.0. Source: Math in Society. Imported at revision 68ee43c.