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Panjang busur = keliling lingkaran x
= 2r x
= 2. 3,14. 10 x
= 62,8 x
= 31,4 cm
Terima kasih dan semoga jawabannya benar :D
3.14 x 20= 62,8 cm
180/360 x 62,8 = 31,4 cm