Odpowiedzi

2010-03-30T21:40:04+02:00
A + 3cm = d
a√2 = a + 3
a ( √2 - 1) = 3 /:(√2 - 1)
a = 3/(√2 - 1) * (√2 + 1)/(√2 + 1)
a = 3√2 + 3/2 + 1
a = 1 + √2
P = a²`
P= (1 + √2)² = 1 + 2√2 + 2
P = 3 + 2√2 cm²

pzdr ;)