3 years ago

Help!! include working out please :)

1 answer:

Elena-2011 [213]3 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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