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Perhatikan gambar berikut! Panjang busur CD adalah ....

Mathematics

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Berikut adalah penyelesaian untuk setiap soal:

1. Perhatikan gambar berikut! Panjang busur CD adalah ....

  1. Gunakan hubungan antara panjang busur dan sudut pusat.

    Rasio panjang busur sebanding dengan rasio sudut pusatnya.
    Diketahui:
    Panjang busur AB (LABL_{AB}) = 4 cm
    Sudut pusat AOB (∠AOB\angle AOB) = 35∘35^\circ
    Sudut pusat COD (∠COD\angle COD) = 140∘140^\circ

  2. Tuliskan perbandingan panjang busur dan sudut pusat.

    LCDLAB=∠COD∠AOB\frac{L_{CD}}{L_{AB}} = \frac{\angle COD}{\angle AOB}
  3. Substitusikan nilai-nilai yang diketahui dan

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