Jawaban:
Diketahui : Persegi Panjang
Keliling = 36 cm
Perbandingan panjang dan Lebar = 5 : 4
Luas = ?
2(p + l) = 36
2(5x + 4x) = 36
2(9x) = 36
18x = 36
18x/18 = 36/18
x = 2
Panjang :
= 5(2)
= 10 cm
Lebar :
= 4(2)
= 8 cm
= p x l
= 10 × 8
= 80 cm²
Jadi, Luasnya adalah 80 cm²
Semoga Membantu
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Jawaban:
Diketahui : Persegi Panjang
Keliling = 36 cm
Perbandingan panjang dan Lebar = 5 : 4
Luas = ?
• Pertama tama, Cari dulu panjang dan lebar sebenarnya :
2(p + l) = 36
2(5x + 4x) = 36
2(9x) = 36
18x = 36
18x/18 = 36/18
x = 2
Panjang :
= 5(2)
= 10 cm
Lebar :
= 4(2)
= 8 cm
• Lalu, Cari Luasnya :
= p x l
= 10 × 8
= 80 cm²
Jadi, Luasnya adalah 80 cm²
Semoga Membantu