Luas persegi panjang sama dengan 2 kali luas persegi. Jika keliling persegi 48 cm dan panjang persegi panjang 18 cm. Hitunglah keliling persegi panjang tsb!
dindajgshock dik :Lpp = 2Lp Ppp = 18 cm Kp = 48 cm dit :Kpp ? jb : Kp = 4s 48 cm=4 s s = 12 cm Lp = s^2 = 12^2 Lp = 144 cm^2 Lpp = 2Lp = 2*144 Lpp = 288cm^2 Lpp = p*l 288 = 18*l l = 288/18 = 16 cm maka Kpp = 2(p+l) = 2(18+16) = 2*34 Kpp= 68 cm
dik :Lpp = 2Lp
Ppp = 18 cm
Kp = 48 cm
dit :Kpp ?
jb : Kp = 4s
48 cm=4 s
s = 12 cm
Lp = s^2
= 12^2
Lp = 144 cm^2
Lpp = 2Lp
= 2*144
Lpp = 288cm^2
Lpp = p*l
288 = 18*l
l = 288/18
= 16 cm
maka Kpp = 2(p+l)
= 2(18+16)
= 2*34
Kpp= 68 cm