Matematika

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bantu jawab no. 20


yaa!!!
bantu jawab no. 20 yaa!!!

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1 Jawaban

  • Kelas 8 Matematika
    Bab Garis dan Sudut

    ∠CBD = 180° - ∠ABD
    ∠CBD = 180° - 7x

    ∠CBD + ∠BCD = ∠CDE
    180° - 7x + 92° = 9x
    272° = 9x + 7x
    16x = 272°
    x = 272°/16
    x = 17°

    ∠CBD = 180° - 7x
    ∠CBD = 180° - 7 . 17°
    ∠CBD = 180° - 119°
    ∠CBD = 61°

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