mohon bantuannya ya teman 2

Bab Lingkaran
Matematika SMP Kelas VIII

1] panjang tali minimal = d (n + π)
panjang tali minimal = 56 ( 2 + 22/7)
panjang tali minimal = 56 x 36/7
panjang tali minimal = 288 cm

2] panjang tali minimal = d (n + π)
panjang tali minimal = 42 (4 + 22/7)
panjang tali minimal = 42 x 50/7
panjang tali minimal = 300 cm

3] panjang tali minimal = d (n + π) = 90
d x (3 + 3,14) = 90
d = 90 : 6,14
d = 14,66 cm