Question

Help me I am stupid and don't know the formula for this

Answer 1

What is the question?

Answer 2

@wolf1728 sorry now its posted

Answer 3

It seems it could either be 5 or 7.2
In triangle ABC the sides are 20 and 24 which is a ratio of
5 to 6
In triangle DEF, the sides would also be in the ratio of
5 to 6
So, side x could be 5 OR
it could be 6*(6/5) = 36/5 or 7.2

Answer 4

@wolf1728 ok so I feel like tis 7.2 just because i don't think it would be 5 again if that makes sense?

Answer 5

I feel it could be either. We don't know whether side EF is similar to
side AB or side CB