Odpowiedź:
Zad. 1
a) P1= a*b = 2*6=12
P2=a*a=2*2=4
Pc= P1 + P2 = 12+ 4 = 16
b) P1 = a*a = 6*6 = 36
P2= (a*h ) :2 = (2*2):2 = 2
P3 = (a*h ) :2 = (2*2):2=2
P4= ((a+b)*h ) :2 = ((4+2)*2):2 = (6*2):2 = 6
P5 = a*a = 1*1 =1
P6 = a*b = 1*2= 2
Pc=P1-P2-P3-P4-P5-P6 = 36-2-2-6-1-2 =23
Zad.2
a) Obw= 2*3 + 2*5 = 6+10=16cm
P=a*b=3*5 =15 cm^2
b) 2,5cm=25mm
Obw= 2*25 +2*12 = 50+24=74 mm
P=a*b = 25*12= 300mm^2
Zad.3
Obw. prostokąta = 2*7 + 2*3 = 14+6 = 20cm
Obw. prostokąta = Obw kwadratu
Obw kwadratu = 4*a
20:4 = 5cm
Pole prostokąta= a*b = 7*3=21 cm^2
Pole kwadratu =a*a= 5*5=25 cm^2
