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⇔5625 cm²
Luas 1 lingkaran=πr²⇔3,14×(8cm)²
⇒200,96 cm²
Luas 24 lingkaran=24×200,96 cm²⇔4823,03 cm²
Sisa karton=5625 cm² - 4823,03 cm²⇔801,96 cm²