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L = πr²
= 3,14 x 25²
= 3,14 x 625
= 1.962,5 cm²
soal b
L = πr²
= 3,14 x 30²
= 3,14 x 900
= 2.826 cm²
L = πr²
= 3,14 × 25²
= 3,14 × 625
= 1.962,5 cm²
B
r = 60/2 = 30
L = πr²
= 3,14 × 30²
= 3,14 × 900
= 2.826 cm²
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semoga bermanfaat.