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1 lingkaran = 360°
1 lingkaran pada jam terbagi 12 bagian
tiap bagian tersebut = 360° : 12 = 30°
maka:
1). 1 x 30° = 30°
2). 2 x 30° = 60°
3). 0 x 30° = 0°
4). 1 x 30° = 30°
5). 2 x 30° = 60°