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trasher [3.6K]
2 years ago
7

This as well, pleasee!!!

Mathematics
2 answers:
lara31 [8.8K]2 years ago
8 0

The inner circle circumference is 18 and the outer is 4

nydimaria [60]2 years ago
6 0

Answer:

the big one has a circumstance of 2*pi*9=56.52

the small one 2*pi*7=43.96

difference = 12.56= 4pi

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