Kk/bg cantik/ganteng bantu dong 1aja gkpapa hehehe​

Jawaban:

1. Dik:

r = 42 cm

Kel = 2 × π × r

= 2 × 22/7 × 42 cm

= 264 cm

Luas = π × r × r

= 22/7 × 42 cm × 42 cm

= 5544 cm²

2. Dik:

r = 10 cm

Kel = 2 × π × r

= 2 × 3,14 × 10 cm

= 62,8 cm

Luas = π × r × r

= 3,14 × 10 cm × 10 cm

= 314 cm²