Question

In the diagram the figures are similar. What is x

A. 2.6ft
B. 3.4ft
C. 0.4ft
D. 2.3ft

Answer 1

i think its is B.  i hope you got the answer right 

Answer 2

I can't see the length very well. I think it's 8 so I'll work with that.
If the figures are similar, then their sides are proportional.
Set up the proportion 8 is to 7 as x is to 3.
8/7 = x/3
Multiply the means and extremes.
7x = 24
x = 3.4

The correct answer is B. 3.4

Hope this helps =)