2a) tembereng
2b) jari jari = OA, OB, OD
apotema = OC
diameter = AD
tali busur = AB
3)AOB, COD, EOF
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2a) tembereng
2b) jari jari = OA, OB, OD
apotema = OC
diameter = AD
tali busur = AB
3)AOB, COD, EOF