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Verified answer
D = 20 cmr = 10 cm
L = π × r²
= 3,14 × 10 × 10
= 314 cm² ( C )
= 3.14 × 10²
= 3.14 × 10 × 10
= 3.14 × 100
= 314 cm²
Maka , Jwbannya adalah c.
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