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= 100
sudut ABO = 180 - 100
= 80 : 2 = 40
Jawaban ( D )
10 ) Sudut PRQ = 180 - 50
= 130 : 2
= 65
sudut AOB 100° karena berpelurus
kan AO = OB karena sama-sama jari-jari
maka 80° : 2 = 40°
no 10
kan itu menghadap busur yang sama berarti sama 50°, kan itu sama kaki berarti 130° : 2 = 65°