Answer:
mΔ1 = 42°
mΔ2 = 42°
<u>Step-by-step explanation:</u>
Δ1 + 138° = 180°
Δ1 = 180° - 138°
Δ1 = 42°
<h2>______________</h2>
Δ2 + 138° = 180°
Δ2 = 180° - 138°
Δ2 = 42°
Answer:
Your answer is right. The sequence has a pattern of -4 every time, so it's A
C. the addition property of equality
