Tolong yg nomor 4 yh!

Soal A
Pbusur = α · Keliling Lingkaran / 360
Pbusur = 50 · 2 · 3,14 · 6 / 360
Pbusur = 100 · 3,14  / 60
Pbusur = 314 / 60
Pbusur = 5,23cm

Soal B
Ljuring = α · Luas Lingkaran / 360
Ljuring = (50 · 3,14) · 6 · (6 / 360)
Ljuring = 157 · 6 / 60
Ljuring = 942 / 60
Ljuring = 15,7cm