Hey , can you help me with this thanks !!

16

Step-by-step explanation:

the sides may not seem to help but it dose go to the other side and try to meser it it would be 4. add 8+4+4 or 8+8=16

18.6cm (rounded to 3 s.f.)  

Step-by-step explanation:

You can actually figure out the two bases of the triangles based on the Pythagoras theorem where the slant length of a 90° triangle is where a is one of the bases and b is the other length that is 90° perpendicular to a.

So this means:

= 8cm

6² + base² = 64cm

36 + base² = 64

base² = 64-36

          = 28

base =

        ≈ 5.2915 (5 s.f.)

So the two bases are roughly 5.2915, and the middle base is part of a rectangle, so it has the same length as the rectangle's length, which is 8cm.

Thus, x = 5.2915 + 5.2915 + 8

            = 18.6cm (rounded to 3 s.f.)