bantu please?? saya sgt butuh jangan ngasal...
Jawaban:
Diameter (d) = 28 m
Jari-Jari (r) = 28 ÷ 2 = 14 m
Sudut Pusat (alpha) = 120°
Luas Juring = alpha/360° × Luas Lingkaran
= 120/360 × Ο × r²
= ⅓ × 22/7 × 14²
= ⅓ × 22/7 × 14 × 14
= ⅓ × 44 × 14
= ⅓ × 616
= 205,33 m²
Panjang Busur = alpha/360° × Keliling Lingkaran
= 120/360 × Ο × d
= ⅓ × 22/7 × 28
= ⅓ × 88
= 29,33 m
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