Question 46753
Remember Pythagorean Theorem

a^2 + b^2 = c^2

side a = 8
side b = 1/2 side c
side c = hypotenuese

8^2 + 1/2*c^2 = c^2
64=1/2 c^2
128= c^2
c=sqrt (128)
b= 1/2 sqrt (128)

good luck