tolong minta jawaban nya nomor 1 sampai 5 besok di kumpul

1 )
A. d = 10 cm
r = 10 ÷ 2 = 5 cm
Luas = 3,14 × 5 × 5 = 78,5 cm2

B. d = 14 cm
r = 14 ÷ 2 = 7 cm
Luas = 22/7 × 7 × 7 = 154 cm2

C. d = 18 cm
r = 18 ÷ 2 = 9 cm
Luas = 3,14 × 9 × 9 = 254,34 cm2

2 ) d = 28 cm
r = 28 ÷ 2 = 14 cm
Luas = 1/2 × 22/7 × 14 × 14
= 308 cm2

3 )
A. Keliling
= 3,14 × 10
= 31,4 cm

B. Keliling
= 3,14 × 12
= 37,68 cm

C. Keliling
= 22/7 × 14
= 44 cm

Sampai No 3 aja ya.