Odpowiedź:
a) P = e*f/2
e = 4
f = 5
P = 4*5/2 = 10
b) P = a*h/2
a = 6
h = 3
P = a*h/2 = 9
c) P = a*h
a = 4
P = 4*3 = 12
d) P = (a+b)*h/2
a = 1
b = 6
P = (1+6)*3/2 = 10.5