besar <BOD adalah a) 85° b) 75° c) 40° d) 20°

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  • SUDUT

    3x-5 + 3x + 25 + 2x = 180°
    8x + 20 = 180°
    8x = 180-20
    8x = 160
    x = 160/8
    x = 20°

    BOD = 3x + 25 = 3×20 + 25 = 60+25 = 85°
    jwb A

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