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Sebuah persegi memiliki panjang sisi 20 cm Hitunglah a. Keliling persegi b. Luas persegi

Rani Maharani

Soal

Sebuah persegi memiliki panjang sisi 20 cm

Hitunglah

a. Keliling persegi

b. Luas persegi

Pembahasan

Diketahui: panjang sisi persegi (s) = 20 cm

Ditanyakan:

a. Keliling persegi

b. Luas persegi

Rumus:

a. Keliling persegi = 4 x s

b. Luas persegi = s^2

Substitusi:

a. Keliling persegi = 4 x 20 = 80 cm

b. Luas persegi = 20^2 = 400 cm^2

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