Tolong ya kk cantik/ganteng.#ngasal report.

19 sec read


Tolong ya kk cantik/ganteng.#ngasal report. ​

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Jawab:

1. KUBUS

  • Sisi (s) = 21 cm
  • V = s x s x s

           = 21 x 21 x 21

           = 9.261 cm³

  • Lp = 6 x (s x s)

             = 6 x (21 x 21)

             = 6 x 441

             = 2.646 cm²

2. BALOK

  • p = 16 cm, l = 8 cm, t = 6 cm
  • V = p x l x t

           = 16 x 8 x 6

           = 768 cm³

  • Lp = 2 x ((pxl) + (p x t) + (l x t))

             = 2 x ((16 x 8) + (16 x 6) + (8 x 6))

             = 2 x (128 + 96 + 48)

             = 2 x 272

             = 544 cm²

3. LINGKARAN

  • d = 20 cm
  • r = d : 2 = 20 : 2 = 10 cm
  • π = 3,14
  • L = π x r x r

          = 3,14 x 10 x 10

          = 314 cm²

  • K = π x d

           = 3,14 x 20

           = 62,8 cm

4. LINGKARAN

  • r = 21 cm
  • π = \frac{22}{7}
  • L = π x r x r

           = \frac{22}{7} x 21 x 21

           = 1.386 cm²

  • K = 2 x π x r

           = 2 x \frac{22}{7} x 21

           = 132 cm


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