c²=a²+b²
c²=(8+√2)²+(8-√2)²
c²=2(64+2)=132
c=2√33
设斜边上的高为h
S=1/2 ab=1/2 c*h
(8+√2)(8-√2)=2√33*h
64-2=2√33 h
h=32/√33
h=32√33/33