Diketauhi : Persegi panjang , panjang 5 cm lebih di lebarnya k=38cm Carilah luasnya ..?
Khoulahagasta
P = panjang L = lebar p = L+ 5 k = 2 (p+L) 38 = 2 (L+ 5 + L) 19 = 2L + 5 2 L = 14 L = 7 P = L + 5 = 7 + 5 = 12 luas = p x L = 12 x 7 = 84 sm kuadrat
L = lebar
p = L+ 5
k = 2 (p+L)
38 = 2 (L+ 5 + L)
19 = 2L + 5
2 L = 14
L = 7
P = L + 5 = 7 + 5 = 12
luas = p x L = 12 x 7 = 84 sm kuadrat