Odpowiedź:
zad 5
e = 6cm
f = 6×3 = 18cm
P=(e×f)÷2 = (6×18)÷2 = 54cm
zad 6
P=a×h = 4×3,5= 14cm
Ob= (a×2)+(b×2) = (4×2)+(7×2) = 8+14=22cm
