Question

A statement and portions of the flowchart proof of the statement are shown.

Which reason should appear in the box labeled 1?

A. Angle Addition Postulate

B. Ruler Postulate

C. Angle Congruence Postulate

D. Linear Pair Postulate

Answer 1

BAC and CAD are adjacent angles, because they share a common vertex (A) and a common side AC, (an no other common points but the points on side AC).


The 2 adjacent angles form a new larger angle (BAD), whose measure is the sum of the measures of the adjacent angles.


This is called the "Angle Addition Postulate"


Answer: A