Pliss jawab sekarang pliss pake pliss​

Jawaban:

3.21 maaf kalo salah

Penjelasan dengan langkah-langkah:

follow

1. 7cm

L= π×r×r

= 22/7×7×7

= 22/7×49

= 22×7

= 154cm

2. 14cm

L= π×r×r

= 22/7×14×14

= 22/7×196

= 22×28

= 616cm

3. 21cm

L= π×r×r

= 22/7×21×21

= 22/7×441

= 22×63

= 1.386cm

4. 28cm

L= π×r×r

= 22/7×28×28

= 22/7×784

= 22×112

= 2.464cm

5. 70cm

L= π×r×r

=22/7×70×70

= 22/7×4.900

= 22×700

= 31,81cm