a
d=a+2
d=a\sqrt{2}
a+2=a\sqrt{2}
a\sqrt{2}-a=2
a(\sqrt{2}-1)=2
a=\frac{2}{\sqrt{2}-1}=\frac{2(\sqrt{2}+1)}{(\sqrt{2}-1)(\sqrt{2}+1)}=\frac{2(\sqrt{2}+1)}{4-1}=\frac{2(\sqrt{2}+1)}{3}
P=a^2=(\frac{2(\sqrt{2}+1)}{3})^2=...
…
P=ab
b^2=d^2-a^2
b=\sqrt{d^2-a^2}
P=a\sqrt{d^2-a^2}
…
P=ah
a=\frac{s}{4}
P=\frac{as}{4}
…
co z tym ramieniem c ?