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COD = 30 derajat
Busur AB = 44 cm
Busur CD = ?
=
CD =
CD = 11 cm
360/sudut AOB × panjang busur Ab
360/120 × 44
3 × 44
132 cm
Maka, panjang busur Cd adalah :
Sudut Cod/360 × keliling lingkaran
30/360 × 132
1/12 × 132
11
Jadi, panjang busur Cd adalah 11 cm.