Geometry Proof Postulates,
Theorems, Definitions, & Properties
Questions with Correct Answers
Addition Property of Equality - ANSWERSIf A=B, then A+C=B+C.
Subtraction Property of Equality - ANSWERSIf A=B, then A-C=B-C.
Multiplication Property of Equality - ANSWERSIf A=B, then AC=BC.
Division Property of Equality - ANSWERSIf A=B and C≠0, then A/C = B/C.
Reflexive Property of Equality - ANSWERSFor any real number A, A=A.
Symmetric Property of Equality - ANSWERSIf A=B, then B=A.
Transitive Property of Equality - ANSWERSIf A=B, and B=C, then A=C.
Substitution Property of Equality - ANSWERSIf A=B, then A can be substituted for B.
Distributive Property of Equality - ANSWERSA(B+C)=AB+AC
Definition of Congruent Angles - ANSWERSTwo angles that have the same measure.
Right Angle Congruence Theorem - ANSWERSAll right angles are congruent.
Congruent Supplements Theorem - ANSWERSIf two angles are supplementary to the
same angles or congruent angles, then they are congruent.
Congruent Complements Theorem - ANSWERSIf two angles are complementary to the
same angles, then they are congruent.
Linear Pair Postulate - ANSWERSIf two angles form a linear pair, then they are
supplementary.
Vertical Angles Theorem - ANSWERSVertical angles are congruent.
Parallel Postulate - ANSWERSIf there is a line and a point not on the line, then there is
exactly one line through the point parallel to the given line.
