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x,y - boki prostokąta
Ob=2x+2y=32
x=3y (lub y=3x, to bez znaczenia)
skoro:
2x+2y=32
to:
2*3y+2y=32
8y=32
y=4
skoro:
x=3y, więc:
x=12
P=12*4=48 j²
Pozdrawiam!
bok b = 4 cm
bo: 12*2 + 4*2= 24 + 8 = 32
a 4*3 daje 12.
Obwód wynosi 32 cm
Pole: a*b=
Pole: 12 * 4= 48 cm[kwadratowych]
a=3b
2(3b)+2b=32
8b=32
b=4
a=3*4=12
P=a*b
P=12*4=48[cm²]