The set of counting numbers {1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ...} is called the set of natural numbers. The natural numbers begin at 1 and go on indefinitely.
Three examples of natural numbers are below.
642,000
440
81
Answer:
3rd one
Step-by-step explanation:
any 2 squares are congruent since all four sides of any square are congruent
C
