-1 is the answer to your question
Answer:
, 4.23 , 9/2
Step-by-step explanation:

9/2 = 4.5
4.23
Answer:
87.31
Step-by-step explanation:
STAY SAVAGE
Adjacent Angles<span> are </span>two angles<span> that share a common vertex, a common side, and no common interior points. (They share a vertex and side, but </span>do<span> not overlap.) A </span>Linear Pair<span> is </span>two<span> adjacent</span>angles<span> whose non-common sides </span>form<span> opposite rays. ... ∠1 and ∠3 are not </span>vertical angles<span> (they are a </span>linear pair<span>).</span>