a=8
k=7
c^2=k^2-(\frac{1}{2}a)^2=7^2-4^2=49-16=33
c=\sqrt{33}
a=6
k=8
c^2=k^2-(\frac{1}{2}a)^2=8^2-3^2=64-9=55
c=\sqrt{55}
H=5
k=\sqrt{33}
x^2=k^2-H^2=(\sqrt{33})^2-5^2=33-25=8
x=\sqrt{8}=\sqrt{2*4}=2\sqrt{2} przekątna kwadratu
x=a\sqrt{2}
2\sqrt{2}=a\sqrt{2}
a=2