Tentukan keliling dan luas lingkaran dengan :

A. diameter = 7
K = πd
= 22/7 x 7
= 22 cm
L = 1/4 πd²
= 1/4 x 22/7 x 7²
= 38,5 cm²
b. jari jari = 10
K = 2πr
= 2 x 3.14 x 10
= 62,8 cm
L = πr²
= 3.14 x 10²
= 314 cm²
c. diameter = 48 cm
K = πd
= 3.14 x 48
= 150,72 cm
L = 1/4πd²
= 1/4 x 3.14 x 48²
= 1.808,64 cm²
maafya cuman bisa jawab 3 semoga jawabannya bener