Tolong dijawab ya :) pakai penjelasannya:) 1. Perhatikan gambar berikut Tentukan A. Nilai X B. <BAC C. <CAD 2. Perhatikan gambar Tentukan A. <ABD B. <DBE C. <CB

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1 Jawaban

  • 1. (a) 2x + 4 + x + 5 = 90
    3x + 9 = 90
    3x = 90 - 9
    3x = 81
    x = 81/3
    x = 27
    (b) <BAC = x + 5
    = 27 + 5
    = 32
    (c) <CAD = 2x + 4
    = 2.27 + 4
    = 54 + 4
    = 58

    2. 8x + 5x + 11 + 2x + 4 = 180
    15x + 15 = 180
    15x = 180 - 15
    15x = 165
    x = 11
    (a) <ABD = 8x
    = 8.11
    = 88
    (b) <DBE = 5x + 11
    = 5.11 + 11
    = 55 + 11
    = 66
    (c) <CBE = 2x + 4
    = 2.11 + 4
    = 22 + 4
    = 26
    (d) <ABE = <ABD + <DBE
    = 88 + 66
    = 154

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