Question 98310
3. MEASURE OF ANGLE K +MEASURE OF ANGLE J=MEASURE OF ANGLE P + MEASURE OF ANGLE 1.
4. MEASURE OF ANGLE A = MEASURE OF ANGLE K + MEASURE OF ANGLE J
5. MEASURE OF ANGLE F = MEASURE OF ANGLE P + MEASURE OF ANGLE 1.
6. MEASURE OF ANGLE A = MEASURE OF ANGLE F.

THE QUESTION ASKS WHAT THE REASON IS FOR STEP 6?

A. SYMMETRIC PROPERTY OF EQUALITY
B. SUBSTITUTION PROPERTY OF EQUALITY
C. ANGLE ADDITION POSTULATE
D. REFLEXIVE PROPERTY OF EQUALITY

the answer is B. Substitution property of equality
Reason 

from the statements
3. MEASURE OF ANGLE K +MEASURE OF ANGLE J=MEASURE OF ANGLE P + MEASURE OF ANGLE 1.
4. MEASURE OF ANGLE A = MEASURE OF ANGLE K + MEASURE OF ANGLE J

we have by substituting MEASURE OF ANGLE K + MEASURE OF ANGLE J=MEASURE OF A IN 
in 3

MEASURE OF ANGLE A = MEASURE OF ANGLE P + MEASURE OF ANGLE 1.

Now statement 5
5. MEASURE OF ANGLE F = MEASURE OF ANGLE P + MEASURE OF ANGLE 1.
Substituting MEASURE OF ANGLE P + MEASURE OF ANGLE 1 as MEASURE OF ANGLE F in the statement above

MEASURE OF ANGLE A = MEASURE OF ANGLE F  which is statement 6