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Studentka2010 [4]
3 years ago
6

The radius of a circle is 21 cm, what is the area?​

Mathematics
1 answer:
max2010maxim [7]3 years ago
3 0

Answer:

A ≈ 1385.4 cm²

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr² ( r is the radius )

  = π × 21²

 = π × 441

 = 441π cm²

 ≈ 1385.4 cm² ( to 1 dec. place )

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