Answer:
Explanation:
30 is an opposite angle (2 angles of 30°)
sum of all angles = 360°
360 - 90 -30 - 150 - 30 = 60°
check
60 + 30 + 150 + 30 + 90 = 360°
the answer is good
b = 60
A straight line is 180 degrees
30+90+b = 180
Combine like terms
120 +b = 180
b =180-120
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