Question

GIVE correct answer No Spam​

Answer 1

Answer:

value of b=30,4b=120,2b=90 . hope this helpfull

Answer 2

Step-by-step explanation:

4b°= 180°

90°+b°+b°=180°

90°+2b°=180°

2b°=180-90

2b°=90

b°=90÷ 2

b°=45