Matematika

Pertanyaan

Hitunglah panjang jari jari lingakran jika keliling nya
A= 110cm phi 22/7
B= 62,8cm phi 3,14

1 Jawaban

  • Keliling A = 110
    π d = 110
    22/7 d = 110
    22d = 770
    d = 770/22
    d = 35

    r = d/2
    r = 17,5 cm

    Keliling B = 62,8
    πd = 62,8
    3,14d = 62,8
    d = 20 cm

    r = d/2
    r = 10 cm

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