Kak tolongin dong hehehe

3. d = 20 cm
L = 314 cm2
4. d = 30 cm
L = 235, 5 cm2
5. d= 24 cm
L = 11304/25 cm2
6. r = 17, 5 cm 
L = 962, 5 cm2
7. r = 14 cm
L = 616 cm2
8. r = 15 cm 
L = 235, 5 cm2
9. r = 17 cm
L =
10. r =20 cm
L = 1256 cm2