Odpowiedź:
B)
P = a · h
obw = 30
P = [tex]\frac{5 x12}{2}[/tex]
30 = 2x + 1 + 5x+ 3 +4 =
= (x +1 ) 30=11x + 8
x = 2
P = 30
C)
Obw = a +b +c
a = 4x - 1
b = 3x + 1
c = 2x +1 +x +1 = 3x +2
Obw = 4x -1 +3x +1 +2x +1 + 1x +1 =
= 10x + 2 = 42/ - 2
x =4
Szczegółowe wyjaśnienie:
