Answer:
Option D, 44
Step-by-step explanation:
Step 1: Find the size of the missing angle
All triangles add up to 180 degrees.
[tex]106 + 30 + x = 180[/tex]
Step 2: Combine like terms
[tex](106 + 30) + x = 180[/tex]
[tex]136 + x = 180[/tex]
Step 3: Subtract 136 from both sides
[tex]136 + x - 136 = 180 - 136[/tex]
[tex]x = 44[/tex]
Answer: Option D, 44
