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Kelas 8 MatematikaBab Lingkaran
Luas daerah yang diarsir
= 1/4 . π . (R² - r²)
= 1/4 . 3,14 . ((10 + 7)² - 10²)
= 1/4 . 3,14 . (289 - 100)
= 1/4 . 3,14 . 189
= 148,365 cm²
Yang paling mendekati = 148,5 cm²