Matematika

Pertanyaan

Dua buah persegi mempunyai keliling masing-masing 52 cm dan 68cm.tentujan selisih luas kedua persegi tersebut

2 Jawaban

  • K1 = 4 x S
    52 = 4 x S
    52 / 4
    S = 13 cm


    K2 = 4 x S
    68 = 4 x S
    68 / 4
    S = 17 cm

    L1 = S x S
    = 13 x 13
    = 169 cm²

    L2 = S x S
    = 17 x 17
    = 289

    => L2 - L1
    => 289 - 169
    => 120 cm²

  • K1 = 4 x s1
    52 = 4 x s1
    S1 = 52/4
    S1= 13

    L1 = s x s
    L1 = 13 x 13
    L1 = 169

    K2 = 4 x s2
    68 = 4 x s2
    S2 = 68/4
    S2= 17

    L2 = s x s
    L2 = 17 x 17
    L2= 289

    Selisih = L2 - L1
    = 289 - 169
    = 120

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