September 2018 1 28 Report
1. keliling lingkaran : 132 cm
phi : 22/7 (dua puluh dua per tujuh)
jari" lingkaran adalah?
2. luas lingkaran : 38.5 cm2
phi : 22/7 (dua puluh dua per tujuh)
jari" lingkaran adalah?
3. jari" roda : 28 cm, jika roda berputar 150 kali. berapakah jarak yg di tempuh roda?



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