Matematika

Pertanyaan

Diketahui m sudut BAD = x + 20 , m sudut BCD = 3x tentukan: a) m sudut BOD minor , b) m sudut BOD mayor

1 Jawaban

  • jawabannya
    180=x+20+3x
    180=4x+20
    4x=180-20
    4x=160
    x=160/4
    =40°
    m<BAD=x+20
    =40°+20°
    =60°
    m<BCD=3(x)°
    =3×40°
    =120°
    jadi,
    a. m<BOD minor=2×m<BAD
    =2×60°
    =120°
    b. m<BOD mayor=2×m<BCD
    =2×120°
    =240°

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