Tolong jawab besok kumpul

1. r = 7 cm
luas = πr2
= 22/7 kali 7 kali 7
=154 cm2
2. r = 10 cm
luas = πr2
= 3,14 kali 10 kali 10
= 314 cm2
3. r = 28 cm
luas = πr2
= 3,14 kali 28 kali 28
= 2.461,76 cm2
4. r = 26 cm
luas = πr2
= 3,14 kali 26 kali 26
= 2.122,64 cm2

#maaf kalau salah