bantuuuuuuuuuuuuuuuuu

K = 220 cm

Diameter = 220 : 22/7 = 220 x 7/22 = 70 cm

Jari2 = 70 : 2 = 35 cm

Luas = 22/7 x 35 x 35 = 105 x 35 = 3675 cm²

keliling = 220 cm
keliling =  phi x d
d = 220 : 22/7 
   = 220 x 7/22 = 70 cm
karena d = 2r
r = 70:2 = 35 cm

luas lingkaran = 22/7 x r²
                         = 22/7 x 35 x 35
                         = 22 x 5 x 35 = 3850 cm² (A)


semoga membantu ^-^