What are u asking? u gave no question or picture
Answer:
Step-by-step explanation:
6, 12, 18
..................
Use the Pythagorean theorem

to find the missing side length of a right triangle
In this case, after you plug in the given numbers your equation is

Then, Just solve that equation for y.



y = 16
So the answer is B, 16 cm.
I hope this helps, please feel free to ask questions if you're still confused :)
(20 + 12) - 8, since the question states n is EIGHT less than the sum of 20 and 12.