Chapter 2.1B, Problem 9A

Write the negation of each statement in exercise 8.

8. Decide on the truth value of each of the following statements.

a. $4+6=10$ or $2+3=5$.

b. A National Football League team can have more than $11$ players on the field while a game is in progress.

c. The first president of the United States was George Washington.

d. If a quadrilateral has three sides of the same length, the quadrilateral has four sides of the same length.

e. If a rectangle has four sides of the same length, then it has three sides of the same length.