Matematika

Pertanyaan

tentukan a.nilai x° b.besar sudut COB
tentukan a.nilai x° b.besar sudut COB

0 Comment.

2 Jawaban

  • a. 8x + 5 (+) 2x + 25=180°
    10x+30 = 180°
    10x=180°-30
    10x= 150
    x = 150 :10
    x=15

    b. cob = 2x +25
    =2(15)+25
    =55°

  • a. (8x +5)° +(2x+ 25)° = 180°
    10x+ 30° = 180°
    10x = 180-30
    10x = 150°
    x = 150°/10°
    x = 15°

    b. Sudut COB = 2x+25°
    = 2(15°) + 25°
    =30° +25°
    = 55°

Pertanyaan Lainnya