Jawaban:
90 cm
Penjelasan dengan langkah-langkah:
72°
Panjang busur = 18
(α/360°) x keliling lingkaran = 18
(72°/360°) x keliling lingkaran = 18
Keliling lingkaran = 18 x 360°/72°
Keliling lingkaran = 90 cm
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Jawaban:
90 cm
Penjelasan dengan langkah-langkah:
72°
Panjang busur = 18
(α/360°) x keliling lingkaran = 18
(72°/360°) x keliling lingkaran = 18
Keliling lingkaran = 18 x 360°/72°
Keliling lingkaran = 90 cm