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Alik [6]
4 years ago
13

Help!! include working out please :)

Mathematics
1 answer:
Elena-2011 [213]4 years ago
3 0
If the perimeter of a circle is d*pi, then you would do ((30*3.14)-(20*3.14))/2 to find the perimeter. 30*3.14=94.2 20*3.14=62.8 94.2-62.8=31.4 31.4/2=15.7 cm
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Step-by-step explanation:

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Step-by-step explanation:

5 0
3 years ago
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lana66690 [7]

Answer:

Step-by-step explanation:

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3 years ago
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Answer:

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4 0
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