Can someone please help me?

Below.

Step-by-step explanation:

       3. 6 6 6 6

6 ) 22.000000

   - 18

     ---

       40        -

      -36

          40

          -36

             40

            -36

             ---

                40

                -36

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.

where is the option given