Why is my include statement not working in the header file

Hi, I’m trying to use include in my theme and templates. I’m testing this bit of code by putting it in the header.php file.

$getDir=get_stylesheet_directory_uri();

include($getDir.’/images/hello.html’);

I’m trying to get a small html file to load from the images directory but the page does not seem to respond to the include() function.

What can I be doing wrong?

Thanks for any suggestions.