# Is the composite of two relations always transitive?

Problem Statement
Does a line from f(x) to the x-axis have any area?
Relevant Equations
not sure how to describe the area of a line
I would assume that it has some area even if it is really really small. But I guess a line implies that the left and right boundaries are going to the middle an infinite amount, so it has area =0? does anyone get what I mean?

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#### FactChecker

Gold Member
2018 Award
You are correct, but there is a way to represent that fact using $dx$ or $\delta x$ and $f(x)$. They might want that for an answer.

PS. I think the title of this thread is wrong.

You are correct, but there is a way to represent that fact using $dx$ or $\partial x$ and $f(x)$. They might want that for an answer.
oh wasn't a hw question, was just wondering myself. I appreciate it though! Also, I use to be able to mark my thread as solved with the old layout. Where is the button on this new one??

#### SammyS

Staff Emeritus
Homework Helper
Gold Member
oh wasn't a hw question, was just wondering myself. I appreciate it though! Also, I use to be able to mark my thread as solved with the old layout. Where is the button on this new one??
Looks as though there is NO such button now.

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