Odpowiedź:
zad.1.
a)
P=a*h=16cm*8cm=128cm2
L=2(w+z)=2(16cm+8cm)=32cm+16cm=48cm
b)
P=(a+b)h/2=(20m+30m)*12m/2=600m*12m/2=7200m2/2=3600m2
L=2*c+r+p=2*13m+20m+30m=26m+50m=76m
zad.2.
P= pole prostokąta - pole trójkąta
P= [2*(20+15)] - (a*h/2)
a= 15-12 = 3
h= 20-16 = 4
P= (40+30) - ( 3*4/2) = 70 - (12/2)= 70 - 6 = 64
