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Verified answer
Diketahui :1/4 Lingkaran
Luas = 9π cm²
Ditanya :
Diameter lingkaran (d) ?
Jawab :
Luas Lingkaran = π r²
karena 1/4 lingkaran maka rumus luas lingkaran menjadi :
Luas Lingkaran = 1/4 * π * r²
9π = 1/4 * π * r²
9 = 1/4 * r²
r² = 9 * 4
r² = 36
r = √36
r = 6 cm
Diameter (d) = 2 * r
d = 2 * 6
d = 12 cm