How do I find the missing sides for this special triangle?

I assume you can do the simple calculations to get the full answer

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :)

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.