Przekatna kwadratu jest o 3 dluzsza od boku.Oblicz pole tego kwadratu
d =aV2 =a+3
aV2 = a+3
aV2-a =3
a(V2-1) =3 I:(V2-1)
a =3/(V2-1) *(V2+1)/(V2+1) =3(V2+1)/(2-1) =3(V2+1)cm
P = a^2
P =[3(V2+1)]^2 =9(2+2V2+1) =9(3+2V2)cm2
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d =aV2 =a+3
aV2 = a+3
aV2-a =3
a(V2-1) =3 I:(V2-1)
a =3/(V2-1) *(V2+1)/(V2+1) =3(V2+1)/(2-1) =3(V2+1)cm
P = a^2
P =[3(V2+1)]^2 =9(2+2V2+1) =9(3+2V2)cm2