Pada gambar di samping, besar <AOD = 64° dan <AEB = 110°. Besar <BOC = ... a. 38° b. 76° c. 87° d. 156° Pakai caranya yaa terima kasih.

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  • SUDUT KELILING DAN SUDUT PUSAT

    cari dulu ABD = 1/2 × 64 = 32°

    BAC = 180-32-110 = 38°

    BOC = 2×38 = 76°

  • ∠AED = 180 - ∠AEB
    ∠AED = 180 - 110 = 70°

    ∠AED = 1/2 × (∠AOD + ∠BOC)
    70 = 1/2 × (64 + ∠BOC)
    64 + ∠BOC = 70 × 2
    64 + ∠BOC = 140
    ∠BOC = 140 - 64
    ∠BOC = 76°

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