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Radda [10]
3 years ago
7

How do you do this??

Mathematics
2 answers:
lisabon 2012 [21]3 years ago
8 0

Answer:

131.964 cm

Step-by-step explanation:

C = 2 \pi r = 2 * 3.142 * 21 = 3.142 * 42 = 131.964 \ cm

Alex777 [14]3 years ago
6 0

The formula for the circumference of a circle = 2 x radius x pi

The radius is given as 21 cm and pi = 3.142

Circumference = 2 x 21 x 3.142 = 131.964 cm

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