Tolong dijawab nomor 16, 17, 18, 19, 20, pakai cara

Tolong dijawab nomor 16, 17, 18, 19, 20, pakai cara

16. B. Tembereng
17. D. Apotema
18. C. $pi {r}^{2}$
19. K = $2pi : r$
= 2. $frac{22}{7} times 7$
= 44 cm^2

20. K = 2 $2pi : r$
= $2 times 3.14.r \$
62.8 = 2. 3,14. r
62.8 = 6,28. r
r = 62.8 : 6,28
r = 10 cm

Maaf Kalo Salah Hehe