Respuesta :

a^2 + b^2 = c^2
a = 6.75
c = 11.25

6.75^2 + b^2 = 11.25^2
45.5625 + b^2 = 126.5625
b^2 = 126.5625 - 45.5625
b^2 = 81
Now take the square root of each side
b = 8