tolong jawabkan sma caranya

panjang busur =40°/360° x 2πr
44 cm = 1/9 x 2 x 22/7 r
44 cm x 9x7=1x2x22 r
2772 cm = 44 r
r = 2772 cm/ 44
r = 63 cm

luas juring = 40°/360°xπr²
=1/9 x 22/7 x 63 cm x 63 cm
=87.318 cm² / 63
=1.386 cm²