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Materi : Garis singgung persekutuan luar
Kelas : VIII SMP
semoga membantu
Panjang tali = 2(2r)+ keliling lingkaran
= 2(2r) + 2×Π×r
= 4r + 2×22/7×3,5
= 4×3,5+ 22
= 14+22
= 36 cm
2. r = 14 : 2 = 7 cm
Panjang tali= 2(3r)+ keliling lingkaran
= 2(3r)+2×Π×r
= 6r+2×22/7×7
= 6×7+44
=42+44
= 86 cm
3. r= 7,6:2=3,8 cm
Panjang tali= 6r + keliling lingkaran
= 6r + 2×Π×r
= 6×3,8 + 2×3,14×3,8
= 22,8 + 23,864
= 46,664 cm
*maaf kalo salah