Euclid relied on five basic axioms to build the propositions in his book Elements. The first axiom states, “Things that are equa
l to the same thing are also equal to one another.” Which modern mathematical statement is equivalent to this axiom? A. If a = b, then b = a.
B. If a = b and b = c, then a = c.
C. If a ≠ b, then b ≠ a.
D. If a = b, then a + c = b + c.
