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Sudut pusat PHK= 360° - (108°+18°+72°+144°)
= 360° - 342°
= 18°
banyak alumni yang PHK
= 18°/108° x 52 orang
= 1/6 x 52 orang
= 8,67 dibulatkan menjadi 9 orang
banyak alumni yang di PHK adalah 9 orang
= 360° - 342°
= 18°
banyak alumni yang di PHK
= 18°/108° x 52
= 52/6
= 8⅔ orang