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Sebuah persegi panjang memiliki panjang 20 cm dan lebar 14 cm. Hitunglah ! a.Luas persegi panjang !

Rani Maharani

Soal

Sebuah persegi panjang memiliki panjang 20 cm dan lebar 14 cm. Hitunglah !

a.Luas persegi panjang !

b. Keliling persegi panjang!

Pembahasan

a. Luas persegi panjang: $L = p \times l = 20 \text{ cm} \times 14 \text{ cm} = 280 \text{ cm}^2$

b. Keliling persegi panjang: $K = 2 \times (p + l) = 2 \times (20 \text{ cm} + 14 \text{ cm}) = 68 \text{ cm}$

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