tolong bantu ya tugas sekolah

K1 = 1/2 × phi × d
= 1/2 × 22/7 × 14
= 22 cm

K2 = 1/2 × phi × d
= 1/2 × 22/7 × 7
= 11 cm

K3 = 1/2 × phi × d
= 1/2 × 22/7 × 21
= 33 cm

k gabungan :
22 cm + 11 cm + 33 cm = 66 cm