Respuesta :

73 - 64 = 9
a = square root 9
a = 3

answer
3 ft
Pythagorean Theorem - a^2 + b^2 = c^2

C being the hypotenuse.

a = a

b = 8 ft

c = √73 ft

a^2 + 8^2 = 
√73^2

a^2 + 64 = 73

a^2 = 9

a = 3