5. Name the Property of Congruence that justifies the statement: If AB CD then CD AB. (1 point)
None of these
6. Write the converse of the following true conditional statement. If the converse is false, write a counterexample.
If x < 30, then x < 20; true.
If x < 30, then x < 20; false. Counterexample: x = 27 and x > 27.
If x > 20, then x > 30; false. Counterexample: x = 25 and x < 30.
If x > 30, then x > 20; true.
7. Use the Subtraction Property of Equality to complete the following statement.
If RS + ST = RT, then RS =?
ST − RT
RT − ST
RT − RS
RS − RT
8. The true conditional statement, "If (m∠ABC) = m∠ABD, then m∠ABC = 2(m∠ABD)," illustrates which property of equality?
Addition Property of Equality
Subtraction Property of Equality
Multiplication Property of Equality
Division Property of Equality
9. The measure of two vertical angles are 8x – 18 and 6x + 14. Find x.