Diketahui jari²= 49 berapakah luas, diameter, keliling tersebutdiketahui jari²=56 berapakah luas, diameter, keliling tersebut

diketahui jari²=63 berapakah luas,
diameter, keliling tersebut

diketahui jari²=70 berapakah luas,
diameter, keliling tersebut​

Jari-jari 49
Luas = π x r^2 = 22/7 x 49 x 49 = 22 x 7 x 49
= 7.546
Diameter = 2 x r = 2 x 49 = 196
Keliling = 2πr = 2 x 22/7 x 49 2 x 22 x 7
= 308

jari-jari 56
Luas = π x r^2 = 22/7 x 56 x 56 = 22 x 8 x 56
= 9.856
Diameter = 2 x r = 2 x 56 = 112
Keliling = 2πr = 2 x 22/7 x 56 = 2 x 22 x 8
= 352

jari-jari 63
Luas = π x r^2 = 22/7 x 63 x 63 = 22 x 9 x 63
= 12.474
Diameter = 2 x r = 2 x 63 = 126
Keliling = 2πr = 2 x 22/7 x 63 = 2 x 22 x 9
= 396

jari-jari 70
Luas = π x r^2 = 22/7 x 70 x 70 = 22x10x70
= 15.400
Diameter = 2 x r = 2 x 70 = 140
Keliling = 2πr = 2 x 22/7 x 70 = 2 x 22 x 10
= 440

jadikan jawaban terbaik ya! maaf jika ada salah