Khan academy question pls help.

17

Step-by-step explanation:

Now, I'm not the best at math, so bear with me. But, seeing as the dilations are spread equally across the shape, by looking at the difference between 45 and 35, we see that it is simply a subtraction of 10. So, if you were to subtract 10 from 27 you would get 17 as the undetermined length.

I could be wrong, I'm not the best at math by any means, but I'm pretty sure that's the correct answer.

55/i dont know i do it for the points

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.