Odpowiedź :
Odpowiedź:
a) a= 3 cm
b= 5 cm
P= a*b
P= 3 cm * 5 cm = 15 cm2
L= 2*a + 2*b
L= 2*3cm + 2*5cm = 16 cm
b) a=2,5cm = 25 mm
b= 12 mm
P= 25 mm * 12 mm = 300 mm2 = 3 cm2
L= 2*25mm + 2*12mm = 50 mm + 24 mm = 74 mm = 7,4 cm
Odpowiedź:
a) a= 3 cm
b= 5 cm
P= a*b
P= 3 cm * 5 cm = 15 cm2
L= 2*a + 2*b
L= 2*3cm + 2*5cm = 16 cm
b) a=2,5cm = 25 mm
b= 12 mm
P= 25 mm * 12 mm = 300 mm2 = 3 cm2
L= 2*25mm + 2*12mm = 50 mm + 24 mm = 74 mm = 7,4 cm