EmilyRamos7800 EmilyRamos7800
  • 12-02-2021
  • Mathematics
contestada

Sebuah persegi di bagi menjadi 3 persegi panjan yang jika di sejajarkan mempunyai keliling 140cm Berapa luas persegi sebelum di bagi

Respuesta :

adefunkeadewole adefunkeadewole
  • 14-02-2021

Answer:

1225 cm²

Step-by-step explanation:

Keliling persegi diberikan sebagai 4 × a

Dimana a = Panjang sisi

Keliling persegi di atas = 140

Karenanya:

4a = 140

a = 140/4

a = 35 cm

Panjang sisi bujur sangkar = 35cm

Luas persegi = (Panjang sisi) ²

Karenanya:

Luas persegi = (35cm) ²

= 1225 cm²

Luas persegi sebelum membagi adalah 1225 cm²

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