Matematika

Pertanyaan

luas lingkaran 1.386 cm².Diameter...cm

2 Jawaban

  • Kelas 55 Matematika
    Bab Bangun Datar Sederhana

    Luas = 1.386
    1/4 x π x d x d = 1.386
    1/4 x 22/7 x d² = 1.386
    d² = 1.386 x 28/22
    d = √(1.764)
    d = 42 cm
  • L = 22/7 X r X r

    1.386 = 22/7 X r2

    1386 : 22 X 7 = r2

    63 X 7 = r2

    441 = r2

    21 = r

    42 = d

Pertanyaan Lainnya