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anggap lebar = y
panjang = 3y
L PP = p x l
48 = 3y x y
48 = 3y²
48 : 3 = y²
16 = y²
√16 = y
4 = y
p = 3y = 3 x 4 = 12 cm
l = y = 4 cm
keliling
2(p+l)
2(12 cm + 4 cm)
2(16 cm)
32 cm
maka kelilingnya = 32 cm
Luas = 48
p = 3l
Dijawab :
Luas = p x l
48 = 3l x l
48 = 3l²
l² = 48/3
l² = 16
l = √16
l = 4
Maka, nilai :
p = 3l
= 3(4)
= 12
Sehingga :
Keliling = 2(p +l)
= 2(12 +4)
= 2(16)
= 32 cm
Itu jawabannya.