C. POSTULATES / AXIOMS AND THEOREMS AXIOMS OF EQUALITY 1. Reflexive Property A quantity is congruent (equal) to itself 2. Symmetric Property If a = b, then b= a. 3. Transitive Property If a = b and b=c, then a = c. 4. Addition Property of Equality If equal quantities are added to equal quantitie real numbers p, q, and r, if p=q, then pur= +. 5. Multiplication Property of Equality If equal quantities are multiplied by equal quantities, Il real numbers p, q, and r, if p=9, then pr = qr.​