45.
POS=180-QOS
POS=180-120
POS=60
POS=sudut pusat
PRS=sudut keliling
sudut pusat = 2 × sudut keliling
POS=2 × PRS
60=2×PRS
PRS = 60:2
PRS =30
46.
AOC=2×ABC
100=2×ABC
ABC=100:2=50
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45.
POS=180-QOS
POS=180-120
POS=60
POS=sudut pusat
PRS=sudut keliling
sudut pusat = 2 × sudut keliling
POS=2 × PRS
60=2×PRS
PRS = 60:2
PRS =30
46.
AOC=2×ABC
100=2×ABC
ABC=100:2=50