kerjakan soal soal berikut ini seperti contoh¡

1.r = 7cm
luas = 154cm
2.r = 10 cm
luas = 314
3.r = 28cm
luas = 2464cm
4.r = 36cm
luas = 4069,44

1. r=7cm
L=22/7×7×7
=22×7=154cm

2.r=10cm
L=3,14×10×10
=314cm

3.r=28
L=22/7×28×28
=2464cm

4.r=36
L=3,14×36×36
= 4069,44cm