Matematika

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Tolong ya pake cara YANG DICARI LUAS DAN KELILING tolong dijawab semuanya hari senin dikumpulkan semunya yaaa tolong
Tolong ya pake cara YANG DICARI LUAS DAN KELILING tolong dijawab semuanya hari senin dikumpulkan semunya yaaa tolong

1 Jawaban

  • 1. K = 5 + 20+10+5+(20-5) = 55 cm
       L1= p x l = 5 x 10 = 50 cm²
       L2 = p x l = 5 x (20-5) = 5 x 15 = 75 cm²
       L total = L1 + L2 = 50 + 75 = 125 cm²

    2. K = 42+50+42+15+10+15 = 174 cm
       L1 (2 segitiga) = a x t = ((50-10)/2) x (15+15) = 20 x 30 = 600 cm²
       L2 = p x l = 10 x 15 = 150 cm²

    3. K 1/2 lingkaran = πr = 22/7 x 21 = 66 cm
       K total = 66 cm + 42 + 42 + 42 = 192 cm
       L 1/2 lingkaran = 1/2πr² = 1/2 . 22/7 . 21 .21 = 693 cm²
       L persegi = s x s = 42 x 42 = 1764 cm²
       L total = 1764-693 = 1071 cm²

    4. K = 10 + 12 + 8 + 12 + 6 = 48 cm
       L1 (jajar genjang) = a x t = 8 x 10 = 80 cm²
       L2 = axt/2 = 6x10/2 = 30 cm²
       L total = 80 + 30 = 110 cm²

    5. K 1/2 lingkaran = πr = 3,14 x 10 = 31,4 cm
       K total = 31,4 + 20 + 20 + 13 + 13 = 97,4 cm
      L 1/2 lingkaran = 1/2πr² = 1/2 . 3,14 . 10.10 = 157 cm²
      L segitiga = axt/2 = 20x6/2 = 60 cm²
      L persegi = s x s = 20 x 20 = 400 cm²
      L total = 400-60-157= 183 cm²

    6. K 1/2 lingkaran = πr = 3,14 x 4 = 12,56 cm
       K total = 16 + 5 + (16-4) + 12,56 + 5 = 50,56 cm
       L persegi panjang = p x l = 16 x 5 = 80 cm²
       L 1/2 lingkaran = 1/2πr² = 1/2 . 3,14 . 4 . 4 = 25,12 cm²
    L total = 80 + 25,12 = 105,12 cm²
    Jadikan jawaban tercerdas ya :)