keliling sebuah lingkaran 44 cm a.carilah panjang diameter nya b. carilah panjang jari jari nya ?
Jawaban bagian A
Cara I
Keliling = 44
2πr = 44
2 x 22/7 x r = 44
r = 44/(2 x 22/7)
r = 44/2 x 7/22
r = 7 cm
Cara II
r = 1/2 d
r = 1/2 x 14
r = 7 cm
Jawaban bagian B
Keliling = 44
πd = 44
322/7d = 44
d = 44/22.7
d = 44 x 7/22
d = 14 cm