Oblicz pole prostokata,którego obwód wynosi 40 cm,a jeden bok jest trzy razy krótszy niż drugi bok.
odp pole ma 45 cm2
40cm - obwód
b = 1/3 * a
2*a + 2*b = 40cm
(2 * a) + (2 * 1/3 * a) = 40cm
(2 i 2/3) * a = 40cm
8/3 * a = 40cm // *(3/8)
a = 15cm
b = 1/3 * 15cm
b = 5cm
P = a * b
p = 15cm * 5cm
P = 45cm^
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odp pole ma 45 cm2
40cm - obwód
b = 1/3 * a
2*a + 2*b = 40cm
(2 * a) + (2 * 1/3 * a) = 40cm
(2 i 2/3) * a = 40cm
8/3 * a = 40cm // *(3/8)
a = 15cm
b = 1/3 * 15cm
b = 5cm
P = a * b
p = 15cm * 5cm
P = 45cm^