Someone please help out. How do I solve this?

b = 15

Step-by-step explanation:

since line UV and TW are congruent you can take both of numbers on those lines and turn it into an equation.

2b - 15 = b

first, subtract 2b from both sides, you're left with -15 = -b

then, divide each side by -1

-15 divided by -1 turns it into a positive 15 which is b.

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.