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< MON = 45
dit = panjang busur =
jawab
keliling lingkaran = 2πr
= 2 × 3.14 × 13
= 81.64
sudut MON P
--------------- = -----------
360 81.64
45 p
----- = ---------
360 81.64
1
--- × 81.64
8
= 10.205