keliling lingkaran 572cm brpa luas lingkaran
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26.026 cm²
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Keliling = 2 × Ο × r
572 = 2 × 22/7 × r
572 = 44/7 × r
r = 572 : 44/7
r = 572 × 7/44
r = 4004/44
r = 91 cm
Luas = Ο × r²
Luas = 22/7 × 91²
Luas = 22/7 × 8.281
Luas = 182182/7
Luas = 26.026 cm²
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