tolong dijawab yaa please..

luas juring = 160/360 x 22/7 x 21² = 4/9 x 22/7 x 441 = 616 cm²

jawab.B

MAPEL = MATEMATIKA
KELAS = 8
BAB = HUBUNGAN SUDUT & LINGKARAN

diketahui =
besar sudut = 160°
jari- jari = 21cm

ditanya = luas lingkaran tersebut?

luas 1 lingkaran = πr²
= 22/7 × 21 × 21
= 22/7 × 441
= 22 × 63
= 1386cm²

luas juring :
[tex] \frac{180}{360} = \frac{x}{1386} \\ \: \: \frac{16}{36} = \frac{x}{1386} \\ 36x = 1386 \times 16 \\ 36x = 22176 \\ \: \: \: \: \: x = \frac{22176}{36} \\ \: \: \: \: \: x = 616 {cm}^{2} [/tex]

luas juring = 616cm²

semoga membantu