Answer:
try 130
Step-by-step explanation:
dont murder me if my math is wrong....
∠ B = 19°
note ∠ C = 90° ( angle in a semi- circle )
The sum of the 3 angles in the triangle = 180°, thus
∠ B = 180° - (90 + 71)° = 180° - 161° = 19°
