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= 45/360 × 2 × π × r
= 1/8 × 2 × 22/7 × 14
= 1/4 × 22 × 2
= 1/2 × 22
= 11 cm
Jadi panjang busur AB adalah 11 cm (B).
= x ( 2 x π x r )
= x (2 x x 14)
= x 88
= 11 cm