Guys tolong dijawab , kalau benar saya kasih 5 poin ( kalau benar and betul)​

Jawaban:

2. D

3.

4. C

5. B

Penjelasan dengan langkah-langkah:

2) K = ¼.2.π.r

= ¼ × 2 × 22/7 × 14

= 22 dm

3) K = 2.π.r

66 = 2. 3,14. r

66 = 6,28r

r = 10,50 dm

4) L = π.r²

= 22/7 × 21 × 21

= 1.386 cm²

5) K = 2.π.r

44 = 2 × 3,14 × r

r = 7

L = π.r²

= 22/7 × 7 × 7

= 154 dm²