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Verified answer
Kelas 8 MatematikaBab Lingkaran
Panjang busur = 11
(θ/360°) . π . 2r = 11
(45°/180°) . 22/7 . 2 . r = 11
1/4 . 44/7 . r = 11
r = 11 . 7/11
r = 7 cm