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Mapel : MatematikaMateri : Lingkaran
Kelas : 8
Nomor 27]
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Panjang Minimal Tali
= 2d + Keliling Lingkaran
= 2(40) + (π x d)
= 80 + (3,14 x 40)
= 80 + 125,6
= 205,6 → Opsi C
Nomor 28]
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panjang Busur
= (1/3) x Keliling Lingkaran
= (1/3) x (π x d)
= (1/3) x (22/7 x 14)
= (1/3) x 44
Karna Busur Yang dibentuk ada 3
Maka,
Jumlah Panjang Busur
= 3 x (1/3 x 44)
= 44 cm
Maka, Panjang Minimal Tali
= 3d + 44
= 3(14) + 44
= 42 + 44
= 86 cm → Opsi B
Nomor 30]
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Banyak Jari Jari yang terbentuk dalam paralon adalah = 16 Jari jari
Maka, Panjang Tali minimal nya
= nr + 2πr
= 16(10) + 2(3,14)(10)
= 160 + 62,8
= 222,8 cm → Opsi C