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b) 88cm
c) 1/44 X 360 = hitung sendiri trus hasil x2
r = 14 cm
dit : d = ...?
kll = ... ?
sudut AOB = ...?
d = 2 . r
= 2 . 14
= 28 cm
Kll = 2 . phi . r
= 2 . 22/7 . 14
= 88 cm
< AOB = Pjg busur AB . 360 derajat / Kll
= 22 . 360 / 88
= 90 derajat