Question

Calcule x na figura

Answer 1

b2 = a • m
( 12 ) 2 = 18m
144 = 18m
m = 144 / 18
m = 8

a = m + n
18 = 8 + n
n = 18 - 8
n = 10

h2 = m• n
h2 = 8• 10
h2 = 80
h = √80
h = 4√5

( 12 ) 2 = ( 4√5 ) 2 + x2
144 = 80 + x2
80 + x2 = 144
x2 = 144 - 80
x2 = 64
x = √64
x = 8

opção B