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barxatty [35]
3 years ago
15

Pls help me outtttt!!!!!

Mathematics
1 answer:
neonofarm [45]3 years ago
6 0

Answer:

b= 69

Step-by-step explanation:

total inside angles = 900

because (7-2)*180 = 900

plus them all and set it = 900

you will get b= 69

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