(15POIN) besok dikumpulkan please jawab pake cara yg dilingkar

1. l = phi r kuadrat
= 22/7 ×5.6 × 5.6 cm
= 98.56 cm2
k = phi d
= 22/7 × (jika diameter 5.6 cm × 2) 11.2 cm
= 35.2 cm
2. l = phi r kuadrat
= 22/7 × 17.5 cm × 17.5 cm
= 962.5 cm2
k = phi d
= 22/7 × 35 cm
= 110 cm
3. l = phi r kuadrat
= 3.14 × 3.4 cm × 3.4 cm
= 36.2984 cm2
k = phi d
= 3.14 × 6.8 cm
= 21.352 cm
4. l = phi r kuadrat
= 3.14 × 27.5 cm × 27.5 cm
= 2374.625 cm2
k = phi d
= 3.14 × 55 cm
= 172.7 cm